DE – Third search conducted for NIH to retrieve results from year 2000 that were earlier omitted. RI - NIHSearch03.PQNIH.0001.2.10 RI - NIHSearch03.PQNIH.0002.2.10 RI - NIHSearch03.PQNIH.0003.2.10 RI - NIHSearch03.PQNIH.0004.2.10 RI - NIHSearch03.PQNIH.0005.2.10 RI - NIHSearch03.PQNIH.0006.2.10 RI - NIHSearch03.PQNIH.0007.2.10 QY - AF("National Institutes of Health" OR "USNIH" OR "nih.gov" OR "National Cancer Institute" OR “NCI” OR “NEI” OR "National Eye Institute" OR "National Heart, Lung, and Blood Institute" OR “NHLBI” OR "National Human Genome Research Institute" OR "National Center for Human Genome Research" OR "National Institute on Aging" OR "National Institute on Alcohol Abuse and Alcoholism" OR "NIAAA" OR "National Institute of Allergy and Infectious Diseases" OR "NIAID" OR "National Institute of Arthritis and Musculoskeletal and Skin Diseases" OR "NIAMS" OR "National Institute of Biomedical Imaging and Bioengineering" OR "NIBIB" OR "Eunice Kennedy Shriver National Institute of Child Health and Human Development" OR "National Institute of Child Health and Human Development" OR "NICHD" OR "National Institute on Deafness and Other Communication Disorders" OR "NIDCD" OR "National Institute of Dental and Craniofacial Research" OR "NIDCR" OR "National Institute of Diabetes and Digestive and Kidney Diseases" OR "NIDDK" OR "National Institute on Drug Abuse" OR "National Institute of Environmental Health Sciences" OR "NIEHS" OR "National Institute of General Medical Sciences" OR "NIGMS" OR "National Institute of Mental Health" OR "NIMH" OR "National Institute on Minority Health and Health Disparities" OR "NIMHD" OR "National Institute of Neurological Disorders and Stroke" OR "NINDS" OR "National Institute of Nursing Research" OR "NINR") NOT AF(Pakistan OR Canada OR "National Institute of Homeopathy") NOT (Books AND Other Sources AND Newspapers AND Reports AND Magazines)