‘Clean athlete status’ cannot be certified: Calling for caution, evidence and transparency in ‘alternative’ anti-doping systems

Andrea Petróczi, Susan H. Backhouse, Ian D Boardley, Martial Saugy, Yannis Pitsiladis, Marjolaine Viret, Gregory Ioannidis, Fabien Ohl, Sigmund Loland, Mike McNamee