All rights reserved. Short sections of text, not to exceed two paragraphs, may be quoted without explicit permission, provided that full acknowledgement is given. • The authors wish to thank Ibrahim Alghelaiqah for helpful suggestions during the preparation of this study. He bears no responsibility for the final outcome.

Al-Ibrahim, Ghodosi and Pieprzyk proposed several methods of batch signature verifiation suitable for concast communication. These schemes are all based on ElGamal-type signature schemes. We prove that their preferred scheme, which does not require interaction among the various signers, is insecure.

 M. S. Ibrahim, MBChB, MRCS(Lond), MSc(Edin), Clinical Research Fellow  H. Twaij, BSc, MBBS, MRCS, Clinical Research Fellow  D. E. Giebaly, MBChB, MRCS(Edin), Clinical Research Fellow  F. S. Haddad, BSc, MCh(Orth), FRCS(Ed), FRCS(Orth), Dip.SportsMed, FFSEM, Consultant Orthopaedic Surgeon, Professor University College Hospital, Department of Trauma & Orthopaedics, 235 Euston Road, London NW...

Duran Canatan1,2, Türker Bilgen3, Vildan Çiftçi1, Gülsüm Yazıcı1, Serpil Delibaş2, İbrahim Keser4 1Antalya Genetic Diagnostic Center, Antalya, Turkey 2Hemoglobinopathy Diagnostic Center of Mediterranean Blood Diseases Foundation, Antalya, Turkey 3Namık Kemal University Research and Application Center for Scientific and Technological Investigations, Tekirdağ, Turkey 4Akdeniz University Faculty o...

Objective: Evaluation of pelvic organs by laparoscopy in infertile patient. Background: Despite of absence of any known risk factor for infertility various studies indicate that there may be abnormalities in pelvic organ in about two-third of the cases, as evidenced by laparoscopic study. Present study was done to have an idea about the problem in a group of patients reporting to specialised ce...