E. Carlos Rodriguez-Merchan gained his MD from Complutense University, Madrid, Spain in 1974 and later obtained a PhD from the same university. In 1978 Dr. Rodriguez-Merchan joined La Paz University Hospital, Madrid and since 1992 he has been a consultant orthopaedic surgeon in the hospital’s Service of Orthopaedic Surgery and Traumatology as well as Chief of the Knee Unit. In 2005 he was also appointed Associate Professor of Orthopaedics at the School of Medicine, Autonomous University, Madrid. Over the past two decades Dr. Rodriguez-Merchan has been particularly dedicated to adult reconstruction of the lower limb and above all to hip and knee arthroplasties. He is also a Consultant of the Haemophilia Centre, at La Paz University Hospital, Madrid, Spain. The Haemophilia Centre has been recognised by the World Federation of Haemophilia, as an International Haemophilia Training Centre. Since 2002 he has been Deputy Editor of Clinical Orthopaedics and Related Research, representing the Spanish Society of Orthopaedics and Traumatology and from 2003 to 2009 he was Editor-in-Chief of Revista Española de Cirugía Ortopédica y Traumatología. He has also been a member of the editorial board of the journal Haemophilia since 1995. Dr. Rodriguez-Merchan has previously published five books in English as well as six in Spanish, and is the author of more than 120 articles in journals indexed in PubMed.