Notice Medicine is an ever-changing science. As new research and clinical experience broaden our knowledge, changes in treatment and drug therapy are required. The author and the publisher of this work have checked with sources believed to be reliable in their efforts to provide inronnation that is complete and generally in accord with the standards accepted at the time of publication. However, in view of the possibility of human error or changes in medical sciences, neither the author nor the publisher nor any other party who has been involved in the preparation or publication or this work warrants that the infomlation contained herein is in every respect accurate or complete, and they disclaim all responsibility for any error.; or omissions or for the results obtained from usc of the information contained in Ihis work. Readers arc encouraged to contiml the infonnation containcd herein with other sources. For example and in particular, readers arc advised to check thc product infomlation sheet includcd in the package of each drug they plan to administer to be certain that the information contained in this work is accuratc and that changes have not been made in the recommended dosc or in thc eontraindications for administration. This recommendation is of particular importance in connection with new or infrequently used drugs.