Research study design.
Bahna
Sami L
SL
Department of Pediatrics, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71103-3932, USA. sbahna@lsuhsc.edu
Conrad
Steven A
SA
D002986:Clinical Trials as Topic; D016021:Epidemiologic Studies; D006801:Humans; D012107:Research Design; D011795:Surveys and Questionnaires