Methods of sampling and data collection.
Indrayan
A
A
Division of Biostatistics and Medical Informatics, University College of Medical Sciences, Dilshad Garden, Delhi 110 095, India.
Satyanarayana
L
L
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