Resumen
An unreferenced statement on page 608 is challenged as being incorrect. FSC and PEFC are competitors and issues on the differences between the programs are often arguable. We do agree that a small portion of the statement could have been more clearly stated, but the intent of the statement was essentially correct. The original article contained 80 references and not every sentence could be referenced. We include 18 additional references below to strengthen and clarify our statement.