The heterogeneity of symptom reporting across study sites: a secondary analysis of a randomised placebo-controlled multicentre antimalarial trial oleh Kamala Thriemer, Robert James Commons, Megha Rajasekhar, Tamiru Shibiru Degaga, Krisin Chand, Nguyen Hoang Chau, Ashenafi Assefa, Mohammad Nader Naddim, Ayodhia Pitaloka Pasaribu, Awab Ghulam Rahim, Inge Sutanto, Tran Tinh Hien, Asrat Hailu, Mohammad Anwar Hasanzai, Lenny L. Ekawati, Adugna Woyessa, Tedla Teferi, Naomi Waithira, Walter R. J. Taylor, Benedikt Ley, Arjen Dondorp, J. Kevin Baird, Nicholas J. White, Nicholas P. Day, Ric N. Price, Julie A. Simpson, Lorenz von Seidlein