Bihar’s pioneering school-based deworming programme: lessons learned in deworming over 17 million Indian school-age children in one sustainable campaign by Drake, LJ, Singh, S, Mishra, CK, Sinha, A, Kumar, S, Bhushan, R, Hollingsworth, TD, Appleby, LJ, Kumar, R, Sharma, K, Kumar, Y, Raman, S, Chakrabarty, S, Kihara, JH, Gunawardena, NK, Hollister, G, Kumar, V, Ankur, A, Prasad, B, Ramachandran, S, Fishbane, A, Makkar, P