Protocol for a Case-Control Study to Investigate the Association of Pellagra With Isoniazid Exposure During Tuberculosis Preventive Treatment Scale-Up in Malawi oleh Scott A. Nabity, Kelvin Mponda, Steve Gutreuter, Diya Surie, Anne Williams, Anne Williams, Andrea J. Sharma, Elizabeth R. Schnaubelt, Rebekah E. Marshall, Hannah L. Kirking, Suzgo B. Zimba, Joram L. Sunguti, Laphiod Chisuwo, Mabvuto J. Chiwaula, Jesse F. Gregory, Robin da Silva, Michael Odo, Andreas Jahn, Thokozani Kalua, Rose Nyirenda, Belaineh Girma, James Mpunga, Nicole Buono, Alice Maida, Evelyn J. Kim, Laurence J. Gunde, Tigest F. Mekonnen, Andrew F. Auld, Adamson S. Muula, John E. Oeltmann