Medicine iS an ever-changing science．As new research and clinical experience broaden our knowledge，changes in treatment and drug therapy are required．The anthors and the publisher of this work have checked with sources believed to be reliable in their efforts to provide infor． marion that iS complete and generally in accord with the standards accepted at the time of pub． 1ication．However，in view of the possibility of human error or changes in medical sciences． neither the authors nor the publisher nor any other party who has been involved in the prepara— tion or publication of this work warrants that the informafion contained herein iS in every re． spect accurate or complete，and they disclaim all responsibility for any errors or omissions or for the results obtained from use of the information contained in this work．Readers are encour． aged to confirm the information contained herein with other sources．For example and in par． ticular，readers are advised to check product information sheet included in tlle package of each drug they plan to administer to be certain that tIle information contained in this work is accu． rate and that changes have not been made in the recommended dose or in the contraindications for administration．This recommendation iS of particular importance in connection with new or infrequently used drugs．
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