Village Health and Sanitation Committees: evaluation of a capacity-building intervention in Bagalkot and Koppal districts of Northern Karnataka by Mohan HL, Jere Dattatreya, Dodawad Manjunath, Ramaiah Nagaraj, Kamati Raghavendra, Garagatti Suresh, Gaikwad Ajay, Kar Arin, Navale Shalini, Biddappa Mallika, Ramesh BM