Only thing I would say there is about the authenticity of the tests they do, if someone were to test me I would be asking a LOT of questions about what they are looking for in the tests,  whether there was anything  else that might trigger the positive results etc. I'm no scientist o  2fa2  r medical expert but I know that most people, including me, when they go to the docs because they don't feel well, they generally accept whatever diagnosis the doc makes without question. But we don't know if its the right diagnosis we just pop the pills prescribed and hope to get better. Who knows? Hope your friends recover OK soon  Zak.