The report summarizes what is known at present and suggests best practices for diagnosis and treatment. It has been published in the May Clinic Proceedings and the full text can be read online.
http://www.mayoclinicproceedings.org/article/S0025-6196(16)30143-4/fulltext
http://www.mayoclinicproceedings.org/article/S0025-6196(16)30143-4/fulltext