I grew up in Southern California (the LA area). Many jw's went to Mexico and the Hoxsey clinic for treatment of various ailments. I've been there several times myself to take brothers and sisters and my own mom! Most went there hoping for a cancer cure. The "treatment" consisted of a special 'tonic' and a very restrictive diet. In my experience, the Hoxsey clinic treatment helped just like prayer helps. In other words, if a person believes that god will cure them of cancer if they pray fervently, so be it! Some folks that I knew got some relief after trying the Hoxsey "cure" but others died, some of them were very young! Neither prayer nor Hoxsey could help some of them!
My mom, well she went there for arthritis treatment. She said it helped. Moms are usually right----except when they're wrong!