1. Comparative study of microfibrillar collagen hemostat (Colgel) and oxidized cellulose (Surgicel) in high transfusion-risk cardiac surgery 
Mustafa Sirlak, MD, Sadik Eryilmaz, MD, Levent Yazicioglu, MD, Ugursay Kiziltepe, MD, Zeynep Eyileten, MD, Mustafa Serkan Durdu, MD, Refik Tasoz, MD, Neyyir Tuncay Eren, MD, Atilla Aral, MD, Bulent Kaya, MD, Hakki Akalin, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 126, Issue 3, Pages (September 2003)
DOI: /S (03)

2. Figure 1 Postoperative blood loss measured every 3 hours.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /S (03) )