Clinic & Health Centers around Thailand

Hey guy's
I am looking for a major clinic or health center that has centers all around Thailand (Looking to get Thai Nationals medicals and vaccinations to work abroad)
Can anyone reccommend any of the major clinics that are a "chain"
Thanks loads
OB

Got me. Never saw any medical requirements provided in Thailand for working out of Thailand, and vaccinations are but very rarely required. And a "chain" of medical providers? You mean like 7-11? As far as I know...  But there's some outrageous big hospitals, a couple of RAM hospitals in Chiang Mai, and six or more others that flash by...