I couldn't find this in medline. All I have is Reverse pressure sofenting by KJ Collerman 2004. Please reply directly to me if you can find the citation. TIA Marilyn Teolis Baptist Hospital 2000 Church St. Nashville TN 37236 [log in to unmask] Phone: (615)284-5373 Fax: (615)284-5861 Confidentiality Notice: This email message, including any attachments, contains information that is confidential and/or legally privileged. The information is intended only for the individual(s) named above. If you are not the intended recipient or the person responsible for delivering the email to the intended recipient, be advised that you have received this email in error and that any use, dissemination, distribution, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error, please purge it immediately and notify the sender.