Tranditional Chinese medicine is better than western medicine to treat 萎縮性胃炎. Western medicine uses antiacide drugs, nothing else. There is a much better chance to reverse 腸化 and cure this disease with tranditional Chinese medicine (you may look for some Youtube vidios talking about how to treat this disease). I don't think your father-in-law should come to US to treat his 萎縮性胃炎. Ask him to find a good Zhong Yi doctor in China.