NOTE TO READERS 
The authors’ views expressed in this publication do not necessarily reflect the views of Brooke Pattrick Publications (Pty) Ltd. Authors may have consulting, or other business relationships, with companies mentioned in this product.

REPRODUCTION
Copyright © 2011 Brooke Pattrick Publications (Pty) Ltd. All rights reserved.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording or any information-storage and retrieval system, without written permission from the managing director of Brooke Pattrick Publications (Pty) Ltd.

ARTICLE REPRINTS
To purchase reprints of articles, please send your request
via e-mail to Barbara Luck at bluck@brookepattrick.co.za

ENVIRONMENT-FRIENDLY PRINTING
All paper is sourced from the Forest Stewardship Council and Chain
of Custody-certified suppliers.
All waste paper from the plant is recycled.
All used plates are recycled.
All new printing equipment is purchased for low energy-consumption levels
and low volatile organic-compound emissions.