Micro-stratification of malaria risk in Nepal: implications for malaria control and elimination by Rijal, KR, Adhikari, B, Adhikari, N, Dumre, SP, Banjara, MS, Shrestha, UT, Banjara, MR, Singh, N, Ortegea, L, Lal, BK, Thakur, GD, Ghimire, P