Chadaphorn Boonsaenyot
College of Medicine and Public Health, Ubonratchathani University
Thailand

Sitthihcai Chaikhan
Public Health Sub Division, College of Medicine and Public Health, Ubonratchathani University
Thailand

Siraprapa Suwannatrai
College of Medicine and Public Health, Ubonratchathani University
Thailand

Supawadee Phuangsanthia
College of Medicine and Public Health, Ubonratchathani University
Thailand

Nukul Mongkol
Office of Physical and Environmental Administration, Ubon Ratchathani University
Thailand