Treatment Allocation. Currently, the 4 pediatric inpatient services each admit patients every other day; the 2 admitting services each accept every other patient without regard to diagnosis. These procedures will not be altered by the study to avoid disrupting current hospital routines while still allowing quasi-randomized assignment to the different services that is unaffected by the child's prior history or his/her diagnoses and condition on admission. The order in which the hospitalist services will be implemented will be randomly determined.