Intravenous doxycycline, azithromycin, or both for severe scrub typhus by Varghese, GM, Dayanand, D, Gunasekaran, K, Kundu, D, Wyawahare, M, Sharma, N, Chaudhry, D, Mahajan, SK, Saravu, K, Aruldhas, BW, Mathew, BS, Nair, RG, Newbigging, N, Mathew, A, Abhilash, KPP, Biswal, M, Prasad, AH, Zachariah, A, Iyadurai, R, Hansdak, SG, Sathyendra, S, Sudarsanam, TD, Prakash, JAJ, Manesh, A, Mohan, A, Tarning, J, Blacksell, SD, Peerawaranun, P, Waithira, N, Mukaka, M, Cheah, PY, Peter, JV, Abraham, OC, Day, NPJ