Methodological issues in the study of cancer and nutrition: alternative designs and lessons learned.
D000886:Anthropometry; D001835:Body Weight; D002149:Energy Intake; D004993:Ethics, Nursing; D005247:Feeding Behavior; D006801:Humans; D009369:Neoplasms / Q000451:nursing / Q000503:physiopathology*; D009747:Nutritional Physiological Phenomena; D012107:Research Design; D012494:Sampling Studies