This information is provided as a professional service to the medical profession by Merck & Co., Inc. The views expressed in this publication reflect the experience and opinions of the authors. Due to individual countries' regulatory requirements, indications and uses of products may vary. Before prescribing any products, please consult the local prescribing information available from the manufacturer. Merck does not recommend the use of its products in any manner other than as described in the prescribing information.