title: Methods of sampling and data collection.
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: D003625:Data Collection / Q000379:methods*; D006801:Humans; D008499:Medical Records / Q000706:statistics & numerical data; D010865:Pilot Projects; D012107:Research Design; D018401:Sample Size; D011795:Surveys and Questionnaires