<prompt> All are defences against medical negligence exceptCalculated risk doctrineContributary negligenceVicarious liabilityLoco parentis  <response>: Defences against medical negligence Calculated risk doctrine Contributary negligence Vicarious liability Corporate negligence Products liability Medical maloccurence Therapeutic misadventures Error in judgement Res indicata Res judicata Composite negligence Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 382 