i know OTs form Thailand, he is kind and lecturer in Chiang Mai Thailand.
maybe you all can contact him on facebook or instagram. he is active on social media.
this is the link. i hope it can help.
https://web.facebook.com/drsupat?hc_ref=ARRW25aFqYZ00BD6QM4_GTGASLOX0fPYnypkYniT7IASFUtNk_TsCNlPb6lyEg_WswM&pnref=story