The need for controls in case control studies

Sunil Kumar Raina
Department of Community Medicine, Dr. Rajendra Prasad Government Medical College, Tanda, Kangra - 176 001, Himachal Pradesh, India

Correspondence Address:
Sunil Kumar Raina
Department of Community Medicine, Dr. Rajendra Prasad Government Medical College, Tanda, Kangra - 176 001, Himachal Pradesh
India

Source of Support: None, Conflict of Interest: None

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DOI: 10.4103/1947-2714.131252