Tulyapruek Tawonsawatruk*, Theeraroj Changthong, Sarinee Pingsuthiwong, Objoon Trachoo, Thanyachai Sura and Wiwat Wajanavisit
* Corresponding author: Tulyapruek Tawonsawatruk tulyapruek@gmail.com
Journal of Orthopaedic Surgery and Research 2011, 6:47 doi:10.1186/1749-799X-6-47