First author also apparently specializes in "alternative and complementary medicine" (i.e. homeopathy) and "parapsychology"[0]. Sounds like a crank. [0] https:

First author also apparently specializes in "alternative and complementary medicine" (i.e. homeopathy) and "parapsychology"[0]. Sounds like a crank. [0] https://en.wikipedia.org/wiki/Harald_Walach https://en.wikipedia.org/wiki/Harald_Walach