London, Nov 20 Human placenta therapist Mariana Kovacevic, who helped cure a host of Premier League stars, including Arsenal striker Robin van Persie and Liverpool defender Glen Johnson, could be put out of business following a widespread problem of unlicensed therapists.

According to reports, Serbia's Health Minister Tomica Milosavljevic has ordered a full investigation into her clinic and whether she has a medical license.

/Kovacevic has sparked interest from all around the world for her bizarre methods of injecting human placenta fluid into the injury, which speeds up recovery. But, Serbia's Health Ministry now wants to investigate her qualifications and working conditions of the clinic, The Mirror reports.

Van Persie and Johnson had visited Kovacevic's clinic in a Belgrade shopping centre, where the Health Department officials have been sent to investigate.

Van Persie has claimed that Kovacevic's methods have helped him, while Johnson and Liverpool team-mate Fabio Aurelio were equally satisfied, with both expected to play this weekend. (ANI)