655—4.4 (17A,147,152,272C) Board action. The board shall review investigative conclusions and do one of the following:
	  1. 	 Close the investigative case without action.
	  2. 	 Request further inquiry.
	  3. 	 Appoint a peer review committee to assist with the investigation.
	  4. 	 Determine the existence of sufficient probable cause and order a disciplinary hearing to be held in compliance with Iowa Code section 272C.6.