Patientś advance directives and the new law.

p*1 = between Patients before and after 09/01/2009;Before*2 = period before 09/01/2009 with change of legislation;After*3 = period after 09/01/2009 with change of legislation;p*4 = between Patients with a DNR before and after 09/01/2009;p*5 = between Patients with a WH/WDLS order before and after 09/01/2009;p*6 = special section of patientś main chart in the Patient data management system (PDMS) for documentation of social history and family conferences.