[1] Univ Calif San Francisco, Dept Family Hlth Care Nursing, 2 Koret Way,N411F,Box 0606, San Francisco, CA 94143 USA
[2] UCSF Benioff Childrens Hosp, Dept Nursing, San Francisco, CA USA
[3] Wills Way Fdn, Chicago, IL USA
[4] Community Reg Med Ctr, NICU & Pediat, Fresno, CA USA
[5] UCSF Benioff Childrens Hosp, Div Neonatol, Oakland, CA USA
[6] UCLA Santa Mon Med Ctr, Neonatal Intens Care Unit, Santa Monica, CA USA
[7] Univ Calif San Diego, Div Neonatol, San Diego, CA 92103 USA
[8] Kaiser Permanente Santa Clara, Div Neonatol, Santa Clara, CA USA
[9] UCSF Dept Pediat, Div Neonatol, San Francisco, CA USA
[10] Cincinnati Childrens Hosp Med Ctr, Perinatal Inst, Div Neonatol, Cincinnati, OH 45229 USA