Passage: St Mungo's Hospital for Magical Maladies and Injuries is a hospital within the Harry Potter universe. Medics at the hospital are not called doctors, but are known as Healers and wear lime-green robes. Founded by famous wizard Healer Mungo Bonham, St Mungo's is located in London. It was established to treat magical maladies, injuries or illnesses endemic to the Wizarding World. To enter the premises, one has to step through the window of what appears to be a derelict department store called Purge & Dowse Ltd. The exteriors of the hospital are red-bricked and dirty, which is the complete opposite of the interiors. Inside, everything is very neat and looks exactly as a hospital should. There are six floors. The emblem of St Mungo's is a magic wand crossed with a bone. This is the hospital where Arthur Weasley is sent after he was attacked by Voldemort's snake, Nagini, in the Ministry of Magic and Minerva McGonagall is hospitalised from severe stunning when Hagrid is forced out of Hogwarts. During one visit, Harry and company happen across Neville Longbottom, who has come with his grandmother Augusta Longbottom to visit his parents in the long-term care ward. They also find former professor Gilderoy Lockhart there, still suffering from the effects of a backfired Memory Charm.

Question: What are the medics at St Mungo's hospital referred to as?
Healers