DES MOINES, Iowa (AP) – State medical board regulators say a Council Bluffs doctor violated treatment standards by improperly sedating patients while he worked alone after-hours at his clinic. As a result Michael Prescher’s medical license is suspended for a year and he must pay a $10,000 fine.  Prescher, a pain treatment doctor, was chief of staff at Jennie Edmundson Hospital in Council Bluffs. His privileges to practice there were suspended after some of the women he treated in 2009 and 2010 alleged he sexually abused them while they were sedated at his office.  Police never found evidence of abuse and the medical board says it was not proven.  Prescher’s attorney, David Richter says the suspension is too severe since none of the sex allegations were proven.  Prescher may reapply for a license in December.