The limits of viability: ethical considerations.
D004992:Ethics, Medical; D006801:Humans; D007224:Infant Care; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D008020:Life Support Care; D018579:Patient Selection; D040841:Resource Allocation; D018570:Risk Assessment; D028761:Withholding Treatment