External Validation of Prognostic model of one-year Mortality in patients requiring prolonged mechanical ventilation - Jaiswal, S; Sadacharam, K; Shrestha, R R; Bhatta, P; Ghimire, R K; Rimal, A; Berhane, Z; Mirza, I; Rather, M; Eiser, A R; Matchett, S (Journal of Nepal Health Research Council, 2012)