Comment on

• The positive effects of different platelet-rich plasma methods on human muscle, bone, and tendon cells.

  Mazzocca AD, McCarthy MB, Chowaniec DM, Dugdale EM, Hansen D, Cote MP, Bradley JP, Romeo AA, Arciero RA, Beitzel K. Mazzocca AD, et al. Am J Sports Med. 2012 Aug;40(8):1742-9. doi: 10.1177/0363546512452713. Epub 2012 Jul 16. Am J Sports Med. 2012. PMID: 22802273
• Effects of different platelet-rich plasma methods.

  Murawski CD, Hofbauer M, Muller B, Fu FH. Murawski CD, et al. Am J Sports Med. 2013 Feb;41(2):NP7. doi: 10.1177/0363546512473730. Am J Sports Med. 2013. PMID: 23371943 No abstract available.