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Babiarz LS, Yousem DM, Parker L, Levin DC, Rao V. Utilization rates of neuroradiology across neuroscience specialties in the private office setting: who owns or leases the scanners on which studies are performed? AJNR Am J Neuroradiol 2011; 33:43-8. [PMID: 22033720 DOI: 10.3174/ajnr.a2738] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Recent literature shows an increasing portion of imaging studies being conducted and interpreted by nonradiologists, especially across the modalities with the highest RVUs. We examined the trends in the Medicare technical charges for private office neuroradiology studies submitted by subspecialists to identify utilization trends among MR and CT scanner owners or lessees over the last decade. MATERIALS AND METHODS The number of neuroradiology studies performed on MR and CT machines owned or leased in private offices was determined from the CMS PSPSMF for 1998-2008. Studies billed through technical and global charges were aggregated. Utilization rates and utilization rate CAGRs were computed by specialty and by imaging study. RESULTS Between 1998 and 2008, MR studies grew by a factor of 2.5 and CT studies grew by 2.1. In 2008, radiologists charged the technical/global fee in 1,386,669 (56.6%), neurologists in 82,360 (3.4%), neurosurgeons in 29,218 (1.2%), multi/IDTF in 617,933 (25.2%), and other specialists in 334,843 (13.7%) of neuroradiology cases. Changes from the 1998 base rate to the 2008 rate per 1000 Medicare beneficiaries were 24.1 to 39.7 for radiologists, 1.03 to 2.4 for neurologists, 0.15 to 0.84 for neurosurgeons, 2.2 to 17.7 for multi/IDTF, and 1.3 to 9.6 for other specialists. All specialties, except for multi/IDTF, showed greater MR utilization increases than CT. Neurology (CAGR of 10.6%), neurosurgery (22.1%), multi/IDTF (23.2%), and other specialists' (24.6%) MR growth outpaced that of radiology's (5.3%). CONCLUSIONS All nonradiologists showed greater overall utilization growth in private office neuroradiology than did radiology. Also, nonradiologists generally showed greater utilization increases in MR than CT. Radiologists' private office neuroradiology technical fee share shrank from 83.6% to 56.6% between 1998 and 2008.
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Shen X, Anne P, Levin D, Rao V, Mishra M, Parker L. Trends in Radiation Oncology Services in the IMRT Era: Evolving Patterns of Usage and Payments in Medicare Patients from 2000-2009. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Pearce M, Salotti J, McHugh K, Kim KP, Craft A, Lubin J, Ron E, Parker L. P1-491 Socio-economic variation in the use of ct scans in young people in the North of England, 1990-2002. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976g.79] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pearce M, Groom A, Relton C, Pollard T, Parker L, Francis R. P2-239 Associations between sex hormones and bone mineral density and bone resorption in 50-year-old men: the Newcastle Thousand Families Study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tennant P, Parker L, Pearce M. P2-304 Childhood infectious diseases and premature adult mortality: results from the Newcastle Thousand Families Study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976k.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Mann K, Hayes L, Parker L, Pearce M. O5-6.4 Lifecourse predictors of physical activity at age 50 years: the Newcastle Thousand Families Study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976b.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Parker L, Mangwani J, Wakeling E, Singh D. Hallux valgus interphalangeus and a novel mutation in HOXA13. Part of the broadening spectrum of Hand-Foot-Genital syndrome. Foot Ankle Surg 2011; 17:e28-30. [PMID: 21549968 DOI: 10.1016/j.fas.2010.12.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2010] [Accepted: 12/19/2010] [Indexed: 02/04/2023]
Abstract
When evaluating foot and hand malformations in children, the orthopaedic surgeon must always consider the possibility of a more serious underlying syndrome with other accompanying abnormalities of organogenesis. We report the case of a 13-year-old female with Hand-Foot-Genital syndrome presenting to our foot and ankle clinic with tarsal coalition and hallux valgus interphalangeus - an unusual variation on the previously reported hallux varus associated with the syndrome. She was subsequently found to have a novel mutation in the HOXA13 gene. To our knowledge, this is the first report of Hand-Foot-Genital syndrome in the orthopaedic literature.
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Berek JS, Edwards RP, Parker L, DeMars LR, Herzog TJ, Lentz SS, Morris R, Akerley WL, Holloway RW, Method M, Plaxe SC, Walker JL, Schindler T, Schulze E, Krasner CN. Catumaxomab treatment of malignant ascites in patients with chemotherapy-refractory ovarian cancer: A phase II study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lazarus MN, Turner-Stokes TJ, Isenberg DA, Ehrenstein MR, Schreiber BE, Valerio C, Handler C, Keir G, Lee R, Martin R, Ong V, Wells A, D'Cruz D, Denton C, Coghlan G, Haque S, Rakieh C, Edlin H, Ahmad Y, Bruce IN, Juarez MJ, Toms TE, Mitchell S, Bowman S, Ng WF, Price E, Kitas G, Ngcozana T, Denton CP, Black CM, Parker L, Brough G, Ong V, Chan M, McHugh N, Dunphy J, Owen P, Shelmerdine J, Haque S, Ahmad Y, Bruce IN. Concurrent oral 4 - Connective tissue disease: OP22. B Cell Numbers and Phenotype at Clinical Relapse Following Rituximab Therapy Differ in SLE Patients According to Anti-Dsdna Antibody Titres. Rheumatology (Oxford) 2011. [DOI: 10.1093/rheumatology/ker072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Piana P, McCann J, Anne R, Gonsalves C, Sato T, Eschelman D, Doyle L, Parker L, Bar Ad V, Brown D. Abstract No. 205: Early arterial stasis preventing complete dose delivery during resin based Y90 radioembolization: Incidence and preliminary outcome. J Vasc Interv Radiol 2011. [DOI: 10.1016/j.jvir.2011.01.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Piana P, McCann J, Anne R, Gonsalves C, Sato T, Eschelman D, Doyle L, Parker L, Bar Ad V, Brown D. Abstract No. 206: Toxicities following radioembolization with Y90 SIR-Spheres: Incidence and contributing risk factors at a single center. J Vasc Interv Radiol 2011. [DOI: 10.1016/j.jvir.2011.01.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Milam M, Java J, Walker J, Parker L, Metzinger D, Coleman R. Incidence of nodal metastasis in endometrioid endometrial cancer risk groups: A Gynecologic Oncology Group multicenter review. Gynecol Oncol 2011. [DOI: 10.1016/j.ygyno.2010.12.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Stokes CA, Dick EP, Bennett JA, Ismail S, Edwards MR, Sabroe I, Parker L. S80 The role of MyD88 in rhinovirus 1B infection. Thorax 2010. [DOI: 10.1136/thx.2010.150938.31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pearce MS, Tennant PWG, Pollard T, Mclean L, Kaye B, Parker L. 042 Lifecourse predictors of adult parenchymal breast tissue density: results from the Newcastle Thousand Families Study. Br J Soc Med 2010. [DOI: 10.1136/jech.2010.120956.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Nelson R, Conklin S, Parker L, Reiss J. Holes are perceived as shaped in a speeded perceptual task. J Vis 2010. [DOI: 10.1167/10.7.1156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kumar NN, Allen K, Parker L, Damanhuri H, Goodchild AK. Neuropeptide coding of sympathetic preganglionic neurons; focus on adrenally projecting populations. Neuroscience 2010; 170:789-99. [PMID: 20674686 DOI: 10.1016/j.neuroscience.2010.07.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 07/20/2010] [Accepted: 07/22/2010] [Indexed: 01/04/2023]
Abstract
Chemical coding of sympathetic preganglionic neurons (SPN) suggests that the chemical content of subpopulations of SPN can define their function. Since neuropeptides, once synthesized are transported to the axon terminal, most demonstrated chemical coding has been identified using immunoreactive terminals at the target organ. Here, we use a different approach to identify and quantify the subpopulations of SPN that contain the mRNA for pituitary adenylate cyclase activating polypeptide (PACAP) or enkephalin. Using double-labeled immunohistochemistry combined with in situ hybridization (ISH) we firstly identified the distribution of these mRNAs in the spinal cord and determined quantitatively, in Sprague-Dawley rats, that many SPN at the T4-T10 spinal level contain preproPACAP (PPP+, 80 ± 3%, n=3), whereas a very small percentage contain preproenkephalin (PPE+, 4 ± 2%, n=4). A similar neurochemical distribution was found at C8-T3 spinal level. These data suggest that PACAP potentially regulates a large number of functions dictated by SPN whereas enkephalins are involved in few functions. We extended the study to explore those SPN that control adrenal chromaffin cells. We found 97 ± 5% of adrenally projecting SPN (AP-SPN) to be PPP+ (n=4) with only 47 ± 3% that were PPE+ (n=5). These data indicate that adrenally projecting PACAPergic SPN regulate both adrenal adrenaline (Ad) and noradrenaline (NAd) release whereas the enkephalinergic SPN subpopulation must control a (sub) population of chromaffin cells - most likely those that release Ad. The sensory innervation of the adrenal gland was also determined. Of the few adrenally projecting dorsal root ganglia (AP-DRG) observed, 74 ± 12% were PPP+ (n=3), whereas 1 ± 1% were PPE+ (n=3). Therefore, if sensory neurons release peptides to the adrenal medulla, PACAP is most likely involved. Together, these data provide a neurochemical basis for differential control of sympathetic outflow particularly that to the adrenal medulla.
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Danks C, Chaudhry MQ, Parker L, Barker I, Banks JN. Development and Validation of an Immunoassay for the Determination of Tebuconazole Residues in Cereal Crops. FOOD AGR IMMUNOL 2010. [DOI: 10.1080/09540100120075808] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Ellis JE, Parker L, Cho J, Arora K. Activin signaling functions upstream of Gbb to regulate synaptic growth at the Drosophila neuromuscular junction. Dev Biol 2010; 342:121-33. [PMID: 20346940 DOI: 10.1016/j.ydbio.2010.03.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Revised: 03/16/2010] [Accepted: 03/16/2010] [Indexed: 11/20/2022]
Abstract
Activins are members of the TGF-ss superfamily of secreted growth factors that control a diverse array of processes in vertebrates including endocrine function, cell proliferation, differentiation, immune response and wound repair. In Drosophila, the Activin ligand Dawdle (Daw) has been shown to regulate several aspects of neuronal development such as embryonic axonal pathfinding, neuroblast proliferation in the larval brain and growth cone motility in the visual system. Here we identify a novel role for Activin signaling in regulating synaptic growth at the larval neuromuscular junction (NMJ). Mutants for Daw, the Activin type I receptor Baboon (Babo), and the signal transducer dSmad2, display reduced NMJ size suggesting that Daw utilizes a canonical Activin signal-transduction pathway in this context. Additionally, loss of Daw/Babo activity affects microtubule stability, axonal transport and distribution of Futsch, the Drosophila microtubule associated protein 1B (MAP1B) homolog. We find that Babo signaling is required postsynaptically in the muscle, in contrast to the well-characterized retrograde BMP/Gbb signal that is required for synaptic growth and function in presynaptic cells. Finally, we show that the Daw/Babo pathway acts upstream of gbb, and is involved in maintenance of muscle gbb expression, suggesting that Activins regulate NMJ growth by modulating BMP activity through transcriptional regulation of ligand expression.
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Verma SK, McClure K, Parker L, Mitchell DG, Verma M, Bergin D. Simple linear measurements of the normal liver: interobserver agreement and correlation with hepatic volume on MRI. Clin Radiol 2010; 65:315-8. [PMID: 20338399 DOI: 10.1016/j.crad.2009.09.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 09/15/2009] [Accepted: 09/30/2009] [Indexed: 12/14/2022]
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Pearce MS, Glinianaia SV, Rankin J, Rushton S, Charlton M, Parker L, Pless-Mulloli T. No association between ambient particulate matter exposure during pregnancy and stillbirth risk in the north of England, 1962-1992. ENVIRONMENTAL RESEARCH 2010; 110:118-22. [PMID: 19863953 PMCID: PMC2832733 DOI: 10.1016/j.envres.2009.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 10/01/2009] [Accepted: 10/02/2009] [Indexed: 05/22/2023]
Abstract
OBJECTIVES Research evidence suggests that exposure to ambient air pollutants can adversely affect the growth and development of the foetus and infant survival. Much less is known regarding the potential for an association between black smoke air pollution and stillbirth risk. This potential association was examined using data from the historical cohort UK Particulate Matter and Perinatal Events Research (PAMPER) study. METHODS Using data from paper-based neonatal records from the two major maternity hospitals in Newcastle upon Tyne (UK), a birth record database of all singletons born during 1961-1992 to mothers resident in the city was constructed. Weekly black smoke levels were obtained from routine data recorded at 20 air pollution monitoring stations over the study period. A two-stage statistical modelling strategy was used, incorporating temporally and spatially varying covariates to estimate black smoke exposure during each trimester and for the whole pregnancy period for each individual pregnancy. Conditional logistic regression models, with stratification on year of birth, were used to assess potential associations between black smoke exposures in pregnancy and stillbirth risk. RESULTS The PAMPER database consists of 90,537 births, between 1962 and 1992, with complete gestational age and residential address information, of which 812 were stillborn. There was no association between black smoke exposures in any trimester or across whole pregnancy and risk of stillbirth. Adjustment for potential confounders did not alter these results. CONCLUSIONS While black smoke in pregnancy is likely to be related to other pregnancy outcomes, our findings do not suggest that black smoke air pollution exposure during pregnancy increases the risk of stillbirth.
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Arumugam C, Metzinger D, Parker L, Helm C. Analysis and Outcome of Front-Line Laparoscopic Surgery for Endometrial Cancer. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pearce MS, Ahmed A, Tennant PWG, Parker L, Unwin NC. Lifecourse predictors of adult fibrinogen concentrations: the Newcastle Thousand Families Birth Cohort. Br J Soc Med 2009. [DOI: 10.1136/jech.2009.096701d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Salotti JA, Nanduri V, Pearce MS, Parker L, Lynn R, Windebank KP. Incidence and clinical features of Langerhans cell histiocytosis in the UK and Ireland. Arch Dis Child 2009; 94:376-80. [PMID: 19060008 DOI: 10.1136/adc.2008.144527] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVES There are few published studies on the epidemiology of Langerhans cell histiocytosis (LCH). We undertook a survey to ascertain all newly diagnosed cases aged 0-16 years in the UK and Republic of Ireland. DESIGN Three methods of ascertainment were used: the British Paediatric Surveillance Unit (BPSU) system, a survey by Newcastle University, and the Children's Cancer and Leukaemia Group (CCLG) registry. Deaths data were obtained from the UK Office for National Statistics and the Central Statistics Office in Ireland. Clinicians who reported cases were sent a questionnaire to obtain demographic and clinical details. RESULTS Over the 2-year period, 94 cases were identified. The age-standardised incidence rate of LCH in children aged 0-14 years was 4.1 per million per year. The sex ratio (M:F) was 1.5:1 and the median age at diagnosis was 5.9 years. Single system disease (predominantly bony involvement) accounted for 73% of cases and 27% had multisystem disease of whom 7% had involvement of "risk organs" (liver, lung, spleen and bone marrow). Three children died, two of whom were diagnosed after death. CONCLUSIONS This is the first study of LCH to use an active surveillance method with additional sources of ascertainment. Our incidence is comparable with those in other national reports, although it is likely to be an underestimate as each method may have missed some cases, either diagnosed or undiagnosed.
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Papadopoulos E, Fragkou I, Mavrogianni V, Gougoulis D, Orfanou D, Gallidis E, Ptochos S, Taitzoglou I, Parker L, Fthenakis G. Persistent efficacy of long-acting moxidectin for control of trichostrongylid infections of sheep. Small Rumin Res 2009. [DOI: 10.1016/j.smallrumres.2008.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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McConachie H, Barry R, Spencer A, Parker L, Le Couteur A, Colver A. Dasl(n)e: the challenge of developing a regional database for autism spectrum disorder. Arch Dis Child 2009; 94:38-41. [PMID: 18456689 DOI: 10.1136/adc.2007.126326] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The setting up of a database of children with autism spectrum disorder (ASD) in the north east of England is described. Best practice has been followed and included involving parents in planning and implementation at all stages, oversight by a multi-agency group, management by a multidisciplinary steering group, and independent administration of the database. From a potential listing of 986 children with ASD aged 3-12 years, the parents of 511 have so far responded (51.8%), although response rate varies considerably by local authority. Data checking has shown the information to be valid and case ascertainment broadly representative. The uses to which the data are being put and the continuing challenges are outlined.
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