HYPOTHESIS 3: Patients discharged by nurses using the RN-RHDS+PT-RHDS protocol plus a Nurse-Initiated Action Form [NIAF] (RN-RHDS+PT-RHDS+NIAF protocol) will have fewer post-discharge readmissions and ED visits than patients discharged using the RN-RHDS+PT-RHDS protocol; the effect will be strongest for patients with low RHDS scores.