[1] Mahidol Univ, Fac Nursing, Ramathibodi Hosp, Salaya, Thailand
[2] Mahidol Univ, Fac Med, Ramathibodi Hosp, Ramathibodi Sch Nursing, Salaya, Thailand
[3] Mahidol Univ, Fac Nursing, Salaya, Thailand
[4] Mahidol Univ, Dept Biostat, Fac Publ Hlth, Salaya, Thailand
[5] Mahidol Univ, Fac Med, Ramathibodi Hosp, Salaya, Thailand