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EBN Health

An imprint of Evidence-based Networks Ltd

85 Newland

Witney, Oxfordshire OX28 3JW, UK


Tel: +44 1865 522326




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© Evidence-based Networks Ltd 2020

Second edition published 2020

First edition published 2007


All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without the prior permission in writing from EBN Health or Evidence-based Networks Ltd.


Although every effort has been made to ensure that all owners of copyright material have been acknowledged in this publication, we would be glad to acknowledge in subsequent reprints or editions any omissions brought to the attention in writing of EBN Health or Evidence-based Networks Ltd.


EBN Health and Evidence-based Networks Ltd bear no responsibility for the persistence or accuracy of URLs for external or third-party internet websites referred to in this publication, and do not guarantee that any content on such websites is, or will remain, accurate or appropriate.


A catalogue record for this book is available from the British Library.


ISBN 13 978 0 99559 547 7


The publisher makes no representation, express or implied, that the dosages in this book are correct. Readers must therefore always check the product information and clinical procedures with the most up-to-date published product information and data sheets provided by the manufacturers and the most recent codes of conduct and safety regulations. The authors and the publisher do not accept any liability for any errors in the text or for the misuse or misapplication of material in this work.


Series design by Thomson Digital, Noida, India

Typeset by Thomson Digital, Noida, India

Printed by Hobbs the Printers Ltd, Totton, Hampshire, UK

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