The authors have no financial or conflicts of interest to disclose.

H.D. 50% ideas, writing, analyzing, and approval. V.W. 50% ideas, supervision, and approval.

Address correspondence and reprint requests to Hinpetch Daungsupawong, Private Academic Consultant, Lak 52 Phonhong, Vientiane 10000, Lao People’s Democratic Republic. E-mail: [email protected]