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Alemayehu E, Mohammed O, Belete MA, Mulatie Z, Debash H, Gedefie A, Weldehanna DG, Eshetu B, Shibabaw A, Tekele SG, Tilahun M, Ebrahim H. Association of prothrombin time, thrombin time and activated partial thromboplastin time levels with preeclampsia: a systematic review and meta-analysis. BMC Pregnancy Childbirth 2024; 24:354. [PMID: 38741046 DOI: 10.1186/s12884-024-06543-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 04/25/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Preeclampsia (PE), an obstetric disorder, remains one of the leading causes of maternal and infant mortality worldwide. In individuals with PE, the coagulation-fibrinolytic system is believed to be among the most significantly impacted systems due to maternal inflammatory responses and immune dysfunction. Therefore, this systematic review and meta-analysis aimed to assess the association of prothrombin time (PT), thrombin time (TT) and activated partial thromboplastin time (APTT) levels with preeclampsia. METHODS This systematic review and meta-analysis was conducted in accordance with the PRISMA guidelines. Articles relevant to the study, published from July 26, 2013, to July 26, 2023, were systematically searched across various databases including PubMed, Scopus, Embase, and Hinari. The methodological quality of the articles was evaluated using the Joanna Briggs Institute critical appraisal checklist. Utilizing Stata version 14.0, a random-effects model was employed to estimate the pooled standardized mean difference (SMD) along with the respective 95% CIs. The I2 statistics and Cochrane Q test were utilized to assess heterogeneity, while subgroup analyses were performed to explore its sources. Furthermore, Egger's regression test and funnel plot were employed to assess publication bias among the included studies. RESULTS A total of 30 articles, involving 5,964 individuals (2,883 with PE and 3,081 as normotensive pregnant mothers), were included in this study. The overall pooled SMD for PT, APTT, and TT between PE and normotensive pregnant mothers were 0.97 (95% CI: 0.65-1.29, p < 0.001), 1.05 (95% CI: 0.74-1.36, p < 0.001), and 0.30 (95% CI: -0.08-0.69, p = 0.11), respectively. The pooled SMD indicates a significant increase in PT and APTT levels among PE patients compared to normotensive pregnant mothers, while the increase in TT levels among PE patients was not statistically significant. CONCLUSIONS The meta-analysis underscores the association between PE and prolonged PT and APTT. This suggests that evaluating coagulation parameters like PT, APTT, and TT in pregnant women could offer easily accessible and cost-effective clinical indicators for assessing PE. However, multicenter longitudinal studies are needed to evaluate their effectiveness across various gestational weeks of pregnancy.
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Affiliation(s)
- Ermiyas Alemayehu
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia.
| | - Ousman Mohammed
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Melaku Ashagrie Belete
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Zewudu Mulatie
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Habtu Debash
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Alemu Gedefie
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Daniel Gebretsadik Weldehanna
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Bruktawit Eshetu
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Agumas Shibabaw
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Saba Gebremichael Tekele
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Mihret Tilahun
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Hussen Ebrahim
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
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Chen Z, Fang F, Yu X. Urinary protein and coagulation-fibrinolysis indicators in preeclampsia: Expression and significance. J Clin Hypertens (Greenwich) 2024; 26:374-381. [PMID: 38430460 PMCID: PMC11007815 DOI: 10.1111/jch.14789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/28/2024] [Accepted: 02/07/2024] [Indexed: 03/03/2024]
Abstract
This study investigates the expression and significance of urinary protein and coagulation-fibrinolysis indicators in preeclampsia, categorized into mild preeclampsia (109 cases) and severe preeclampsia (97 cases) based on disease severity. Additionally, 110 patients with gestational hypertension (gestational hypertension group) were included for comparative analysis. General information, laboratory indicators, urinary protein, and coagulation-fibrinolysis indicator levels were collected for each group. Significant differences were observed in blood pressure among groups (P < .05), while uric acid, serum creatinine, aspartate transaminase, alanine transaminase, and triglycerides showed no significant differences (P > .05). Total cholesterol, triglycerides, and low-density Lipoprotein levels in severe preeclampsia were higher than those in mild preeclampsia and gestational hypertension groups, whereas high-density lipoprotein, albumin, and platelet levels were lower in severe preeclampsia. No significant differences were observed in prothrombin time or D-dimer levels among groups (P > .05). Urinary protein, urinary protein quantification, activated partial thromboplastin time, thrombin time, and fibrinogen were identified as influencing factors for adverse maternal and infant outcomes in severe preeclampsia patients. The study concludes that urinary protein and coagulation-fibrinolysis indicators are elevated in preeclampsia, particularly in severe preeclampsia cases, suggesting their potential use as diagnostic influencing factors for severe preeclampsia.
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Affiliation(s)
- Zhen Chen
- Department of ObstetricsRenmin HospitalHubei University of MedicineShiyanHubeiChina
| | - Fang Fang
- Department of ObstetricsRenmin HospitalHubei University of MedicineShiyanHubeiChina
| | - Xiaoqian Yu
- Department of ObstetricsRenmin HospitalHubei University of MedicineShiyanHubeiChina
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Kontovazainitis CG, Gialamprinou D, Theodoridis T, Mitsiakos G. Hemostasis in Pre-Eclamptic Women and Their Offspring: Current Knowledge and Hemostasis Assessment with Viscoelastic Tests. Diagnostics (Basel) 2024; 14:347. [PMID: 38337863 PMCID: PMC10855316 DOI: 10.3390/diagnostics14030347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/22/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024] Open
Abstract
Pre-eclampsia (PE) is a placenta-mediated disease and remains a major cause of maternal and neonatal mortality and morbidity. As PE develops, normal pregnancy's hypercoagulable balance is disrupted, leading to platelet hyperactivation, excessive pathological hypercoagulability, and perturbed fibrinolysis. This narrative review aims to summarize the current knowledge regarding hemostasis in PE compared with healthy gestation and the potential effects of maternal PE on neonatal hemostasis. Finally, it aims to discuss hemostasis assessments for normal pregnancies and PE, emphasizing the role of viscoelastic tests, namely, thromboelastography (TEG) and thromboelastometry (ROTEM), for monitoring PE-associated hemostatic alterations. The use of TEG/ROTEM for assessing the hemostatic profile of PE women has been little considered, even though conventional coagulation tests (CCTs) have not helped to monitor hemostasis in this population. Compared with normal pregnancy, TEG/ROTEM in PE reveals an excessive hypercoagulability analogous with the severity of the disease, characterized by higher-stability fibrin clots. The TEG/ROTEM parameters can reflect PE severity and may be used for monitoring and as predictive markers for the disease.
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Affiliation(s)
- Christos-Georgios Kontovazainitis
- 2nd Neonatal Department and Neonatal Intensive Care Unit (NICU), “Papageorgiou” University Hospital, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece; (C.-G.K.); (D.G.)
| | - Dimitra Gialamprinou
- 2nd Neonatal Department and Neonatal Intensive Care Unit (NICU), “Papageorgiou” University Hospital, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece; (C.-G.K.); (D.G.)
| | - Theodoros Theodoridis
- 1st Department of Obstetrics and Gynecology, “Papageorgiou” University Hospital, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece;
| | - Georgios Mitsiakos
- 2nd Neonatal Department and Neonatal Intensive Care Unit (NICU), “Papageorgiou” University Hospital, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece; (C.-G.K.); (D.G.)
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Collis R, Bell S. The Role of Thromboelastography during the Management of Postpartum Hemorrhage: Background, Evidence, and Practical Application. Semin Thromb Hemost 2023; 49:145-161. [PMID: 36318958 DOI: 10.1055/s-0042-1757895] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Postpartum hemorrhage (PPH) is a common cause of significant maternal morbidity and mortality that can be associated with coagulopathy, especially hypofibrinogenemia. There is interest in point-of-care viscoelastic hemostatic assays (POC-VHA) in PPH because prompt knowledge of coagulation status can aid diagnosis, identify cases of severe coagulopathy, and allow ongoing monitoring during rapid bleeding. The incidence of coagulopathy in most cases of PPH is low because of the procoagulant state of pregnancy, including raised fibrinogen levels of around 4 to 6 g/L. A Clauss fibrinogen of >2 g/L or POC-VHA equivalent has been found to be adequate for hemostasis during PPH. POC-VHA has been used successfully to diagnose hypofibrinogenemia (Clauss fibrinogen of ≤2 g/L) and guide fibrinogen treatment which has reduced bleed size and complications of massive transfusion. There are uncertainties about the use of POC-VHA to direct fresh frozen plasma and platelet administration during PPH. Several POC-VHA algorithms have been used successfully incorporated in the management of many thousands of PPHs and clinicians report that they are easy to use, interpret, and aid decision making. Due to the relative cost of POC-VHA and lack of definitive data on improving outcomes, these devices have not been universally adopted during PPH.
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Affiliation(s)
- Rachel Collis
- Department of Anaesthetics, University Hospital of Wales, Cardiff, United Kingdom
| | - Sarah Bell
- Department of Anaesthetics, University Hospital of Wales, Cardiff, United Kingdom
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Deng Y, She L, Li X, Lai W, Yu L, Zhang W, Nie Y, Xiao S, Liu H, Zhou Y, Luo T, Deng W, Liu J, Zhou X, Wen Y, Zhong Y, Xiao L, Ding Y, Peng M. Monitoring hypertensive disorders in pregnancy to prevent preeclampsia in pregnant women of advanced maternal age: Trial mimicking with retrospective data. Open Med (Wars) 2022; 17:1840-1848. [DOI: 10.1515/med-2022-0560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 07/20/2022] [Accepted: 07/25/2022] [Indexed: 11/23/2022] Open
Abstract
Abstract
This study investigated the implication of monitoring hypertensive disorders in pregnancy (HDP) to prevent preeclampsia (PE) in pregnant women of advanced maternal age. Between January 2016 and April 2021, 262 consecutive pregnant women aged ≥40 years were recruited. Extensive monitoring of hypertensive disorders in pregnancy, including blood hypercoagulability screening and subsequent interventions, was performed in 129 pregnant women in our university hospital. The remaining 133 patients from other centres, who did not receive antenatal maternal pregnancy screening and preventive intervention during the same period, constituted the non-intervention group enabling comparison to mimic a trial. The incidences of hypertensive disorders, mild and severe PE, eclampsia, and chronic hypertension complicated by PE in the intervention group were significantly lower than in the non-intervention group (10.08 versus 20.30%, 8.52 versus 18.80%, 7.75 versus 21.05%, 0 versus 3.01%, and 3.86 versus 15.04%, respectively; P < 0.05). Premature birth, low birth weight, and foetal loss were significantly rarer in the intervention group than in the non-intervention group (6.98 versus 24.81%, 7.75 versus 21.80%, and 0.78 versus 14.29% respectively; P < 0.001). The comparison of MP with routine blood coagulation biochemical examination found that the MP detection system of Beijing Yes Medical Devices Co., Ltd., had similar sensitivity as thromboelastogram. Still, it was significantly better than the routine biochemical indicators (P < 0.01). Based on MP parameters, early anticoagulant treatment with low-molecular-weight heparin or low-dose aspirin in pregnant women with hypercoagulability can effectively prevent the occurrence of PE and significantly improve the prognosis of both mothers and infants.
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Affiliation(s)
- Yali Deng
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Lifei She
- Department of Pharmacy, The Maternal and Child Health Hospital of Hunan Province , Changsha 410000 , P.R. China
| | - Xiaoye Li
- Department of Gynaecology and Obstetrics, Sanya Central Hospital (Hainan Third People’s Hospital) , Sanya 572000 , P.R. China
| | - Weisi Lai
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Ling Yu
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Wen Zhang
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Yanting Nie
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Songyuan Xiao
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Hongyu Liu
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Yang Zhou
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Ting Luo
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Wen Deng
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Jinyu Liu
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Xihong Zhou
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Ying Wen
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Yanhong Zhong
- Department of Gynaecology and Obstetrics, Maternal and Child Health Hospital in Yuanjiang City , Yuanjiang 413111 , P.R. China
| | - Lingyi Xiao
- Department of Gynaecology and Obstetrics, Affiliated Hospital of Xiangnan University , Chenzhou 423000 , P.R. China
| | - Yiling Ding
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , Changsha 410011 , P.R. China
| | - Mei Peng
- Department of Gynaecology and Obstetrics, The Second Xiangya Hospital of Central South University , No. 139 People’s Middle Road , Changsha 410011 , P.R. China
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Liew-Spilger AE, Sorg NR, Brenner TJ, Langford JH, Berquist M, Mark NM, Moore SH, Mark J, Baumgartner S, Abernathy MP. Viscoelastic Hemostatic Assays for Postpartum Hemorrhage. J Clin Med 2021; 10:3946. [PMID: 34501395 PMCID: PMC8432102 DOI: 10.3390/jcm10173946] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/26/2021] [Accepted: 08/29/2021] [Indexed: 12/15/2022] Open
Abstract
This article discusses the importance and effectiveness of viscoelastic hemostatic assays (VHAs) in assessing hemostatic competence and guiding blood component therapy (BCT) in patients with postpartum hemorrhage (PPH). In recent years, VHAs such as thromboelastography and rotational thromboelastometry have increasingly been used to guide BCT, hemostatic adjunctive therapy and prohemostatic agents in PPH. The three pillars of identifying hemostatic competence include clinical observation, common coagulation tests, and VHAs. VHAs are advantageous because they assess the cumulative contribution of all components of the blood throughout the entire formation of a clot, have fast turnaround times, and are point-of-care tests that can be followed serially. Despite these advantages, VHAs are underused due to poor understanding of correct technique and result interpretation, a paucity of widespread standardization, and a lack of large clinical trials. These VHAs can also be used in cases of uterine atony, preeclampsia, acute fatty liver of pregnancy, amniotic fluid embolism, placental abruption, genital tract trauma, surgical trauma, and inherited and prepartum acquired coagulopathies. There exists an immediate need for a point-of-care test that can equip obstetricians with rapid results on developing coagulopathic states. The use of VHAs in predicting and treating PPH, although in an incipient state, can fulfill this need.
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Affiliation(s)
- Alyson E. Liew-Spilger
- Department of Obstetrics and Gynecology, University of Oklahoma College of Medicine, Oklahoma City, OK 73104, USA;
| | - Nikki R. Sorg
- Indiana University School of Medicine South Bend Campus, Notre Dame, IN 46617, USA; (N.R.S.); (N.M.M.); (J.M.)
| | - Toby J. Brenner
- Division of Natural Sciences, Indiana Wesleyan University, Marion, IN 46953, USA;
| | - Jack H. Langford
- College of Pharmacy and Health Sciences, Butler University, Indianapolis, IN 46208, USA;
| | - Margaret Berquist
- College of Science, University of Notre Dame, Notre Dame, IN 46556, USA;
| | - Natalie M. Mark
- Indiana University School of Medicine South Bend Campus, Notre Dame, IN 46617, USA; (N.R.S.); (N.M.M.); (J.M.)
| | - Spencer H. Moore
- Marian University College of Osteopathic Medicine, Indianapolis, IN 46222, USA;
| | - Julie Mark
- Indiana University School of Medicine South Bend Campus, Notre Dame, IN 46617, USA; (N.R.S.); (N.M.M.); (J.M.)
| | - Sara Baumgartner
- Department of Obstetrics and Gynecology, Saint Joseph Regional Medical Center, Mishawaka, IN 46545, USA
| | - Mary P. Abernathy
- Department of Obstetrics and Gynecology, Indiana University School of Medicine, Indianapolis, IN 46202, USA;
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Xie X, Wang M, Lu Y, Zeng J, Wang J, Zhang C, Zhu H, Song Y, Han L, Liu Y, Zhang J, Li L, Chen L, Zhai Y, Cao Z. Thromboelastography (TEG) in normal pregnancy and its diagnostic efficacy in patients with gestational hypertension, gestational diabetes mellitus, or preeclampsia. J Clin Lab Anal 2021; 35:e23623. [PMID: 33067885 PMCID: PMC7891543 DOI: 10.1002/jcla.23623] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Thromboelastography (TEG) provides global assessment of hemostatic function and has been recommended to monitor potential coagulopathies during pregnancy in which hypercoagulable state is favored. In present study, we established the reference intervals (RIs) of the TEG parameters (R, K, MA, and α-angle) with Chinese pregnant women of third trimester. In addition, we examined the diagnostic efficacies of the TEG parameters in the patients diagnosed of gestational hypertension (GH), gestational diabetes mellitus (GDM), or preeclampsia (PE). METHODS With specified including and excluding criteria, non-pregnant controls, healthy pregnant women, and pregnant women with GH, GDM, or PE had their venous blood drawn at Beijing Obstetrics and Gynecology Hospital, followed by TEG tests performed in the clinical laboratory. RESULTS The RIs determined with the healthy pregnant women (in third trimester) for R, K, MA, and α-angle were 4.0-7.7, 1.2-3.2, 51.9-70.1, and 41.4-74.4, respectively. When compared with the healthy pregnancy group, the K value was significantly decreased in GH patients but increased in PE patients; MA was significantly lower in the PE group. In the receiver operating characteristic curve (ROC) analyses, K value was able to efficiently distinguish normal pregnancy from the GH patients, with an AUC of 0.86 which is far better than those of R (AUC = 0.57) and MA (AUC = 0.56). For the PE patients, the AUC of MA (0.69) was significantly greater than that of R (0.50). CONCLUSIONS Thromboelastography may provide more accurate experimental basis for monitoring coagulation functions especially in pregnant women with complications of GH and PE.
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Affiliation(s)
- Xin Xie
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Meng Wang
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Yifan Lu
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Jiazi Zeng
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Jing Wang
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Chunhong Zhang
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Hongyuan Zhu
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Yujie Song
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Lican Han
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Ying Liu
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Jingnan Zhang
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Lei Li
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Lu Chen
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Yanhong Zhai
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
| | - Zheng Cao
- Department of Laboratory MedicineBeijing Obstetrics and Gynecology HospitalCapital Medical UniversityBeijingChina
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