print_run only considers request_report.updated_at and not requests.updated_at which gets updated during unlock process; hilis3_convert History processes PID modifications for patient_edits table; added some retired GP's to hilis3_convert Referrers table
HMRN treatment validation checks end_date not before start_date; protected Utils::to_datetime_using_datecalc() DT object creation with eval in case Decode_Date_EU fails eg if using validation FV_and()
