tokens: Multiple option responses covering 25 themes included definition of type of practice ; number of NMOSD cases ; ethnicity ; utilization of the 2015 International Panel criteria for the diagnosis of Neuromyelitis optica ( IPDN ) ; clinical phenotypes ; methodology utilized for determination of anti - Aquaporin-4 ( anti- AQP4 ) antibodies serological testing , and if this was performed locally or processed abroad ; treatment of relapses , and long - term management were surveyed .