Injury, 'stem cell' and Dexamethasone

Badminton champion Lee Chong Wei hopes Malaysians pray for him as he leaves for the hearing of his doping case in Amsterdam this week. Who injected 'stem cells' into his joint with massive Dexamethasone? What part did Pemandu play in clinical trials on 'stem cells'? Do these trials follow international standard? Let us have the true answers.