Thanks to all who replied. Got the problem sorted. Once again what a great resource this forum is. best wishes. Peadar Dr Peadar McGing, FRCPath EurClinChem, Principal Biochemist, Biochemistry Dept., Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland. Tel: (+353 1)8032374; Fax: (+353 1)8034781. ----------------------------Disclaimer-------------------------------------- This e-mail and any files transmitted with it contain information which may be confidential and which may also be privileged and is intended solely for the use of the individual or entity to which it is addressed. Unless you are the intended recipient you may not copy or use it, or disclose it to anyone else. Any opinions expressed are that of the individual and not necessarily that of Mater Misericordiae University Hospital. ---------------------------------------------------------------------------- ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/