public void viewwaitinglist() throws ERException {
		ArrayList<Patient> a = Waitlist.getPatientsCategorizedByUrgency().get("URGENT");
		ArrayList<Patient> b = Waitlist.getPatientsCategorizedByUrgency().get("LESS URGENT");
		ArrayList<Patient> c = Waitlist.getPatientsCategorizedByUrgency().get("NON URGENT");
		String s = "URGENT\n";
		for (int i = 0; i < a.size(); i++) {
			s = s + a.get(i).getFullName()+ ", " + a.get(i).getDateOfBirth() + ", " +  a.get(i).getHealthcardNumber() + "\n";
		}
		s = s + "LESS URGENT\n";
		for (int i = 0; i < b.size(); i++) {
			s = s + b.get(i).getFullName()+ ", " + b.get(i).getDateOfBirth() + ", " +  b.get(i).getHealthcardNumber() + "\n";
		}
		s = s + "NON URGENT\n";
		for (int i = 0; i < c.size(); i++) {
			s = s + c.get(i).getFullName()+ ", " + c.get(i).getDateOfBirth() + ", " +  c.get(i).getHealthcardNumber() + "\n";
		}
	}