I've seen numerous doctors and specialists and attended a Long COVID clinic. Dr Marr has been by far the most knowledgeable and helpful doctor I've ever seen. I can't stress how far ahead her knowledge is compared with every other doctor or clinic I've attended. I feel like I won the lottery. Dr Marr has a very broad and deep understanding of chronic diseases in general. Dr Marr has helped prescribe all of the appropriate tests and experimental treatments I wished to use. Dr Marr is happy to lead with a test and treatment plan, as well as follow and provide directional expertise on the paths you wish to explore. She listens and she cares.