<prompt> Plasmapharesis is used in all of the following exceptMyaesthenic crisisCholinergic crisisGullian Barre syndromePolymyositis  <response>: Plasmapheresis of the autologuous and exchange types is used to treat a variety of disorders, including those of the immune system, such as Goodpastures syndrome, Guillain-Barre syndrome, lupus, Polymyositis , myasthenia gravis, and thrombotic thrombocytopenic purpura. Ref - pubmed.com 