title: Designs of medical studies.
authors.affiliation: Division of Biostatistics and Medical Informatics, University College of Medical Sciences, Dilshad Garden, Delhi 110 095, India.
authors.forename: A
authors.initials: A
authors.lastname: Indrayan
authors.forename: L
authors.initials: L
authors.lastname: Satyanarayana
mesh_terms: D001699:Biometry; D006801:Humans; D012107:Research Design