THE INDIAN JOURNAL OF CHEST DISEASES AND ALLIED SCIENCES (ISSN 0377-9343) is published quarterly, by the Vallabhbhai Patel Chest Institute, University of Delhi, Delhi in association with the National College of Chest Physicians (India). The Journal covers the Clinical and Experimental work dealing with all aspects of Chest Diseases and Allied Sciences. It publishes Original Articles, Review Articles, Radiology Forum, Case Report, Short Communications, Book Reviews.

Copyright @2007 with Vallabhbhai Patel Chest Institute, University of Delhi, Delhi. All rights reserved; no part of this publication should be reproduced and/or stored in a retrieved system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission from the Publishers in India and/or in the USA by the Copyright Clearance Center, 222, Rosewood Drive, Danvers, MA 01923.

The statements and opinions contained in this journal are solely those of the authors/advertisers. The Publishers and Editor-in-Chief, its Editorial Board Members, and employees disown all responsibility of any injury to persons or property resulting from any ideas or products referred to in the articles or advertisements contained in this Journal.

The journal has a wide International and National Circulation/ Exchange and is abstracted and indexed in Index Medicus, Excerpta Medica, Medline, IndMed, INSEAR and Ulrich's Directory.