Never mind, I found it myself. He appears to have been getting plasma rich in growth (PRGF-Endoret) factors.
I'm guessing this is essentially what is generically called PRP, which was formerly banned by WADA, but then permitted as of Jan 1, 2011.
yes it's obviously his usual PRP treatment but it's quite an important and worrying news imo that this treatment which had indeed made miracles for him since 2010 (he used it and hence recovered quickly several times, not like in 2009) didn't work this time, that was the main info from Johnny Groove's article imo.
That's the pessimistic point I get about him in the future in this article.
Because he had had to use PRP treatments quite often since the beginning of the year, what will he do if this has lost its effect ?