1. Viability and histologic structure of porcine valves after cryopreservation 
M.Esther Rendal Vázquez, PhD, T.Díaz Román, MD, M.González Cuesta, MD, C.Zavanella Botta, MD, J.Sánchez Ibáñez, MD, S.Pértega Díaz, PhD, C.Andión Nuñez, MD 
The Annals of Thoracic Surgery 
Volume 77, Issue 1, Pages (January 2004)
DOI: /S (03)

2. Fig 1
Internal elastic lamina and circular elastic fragmentation. (Orcein stain: original magnification ×400.)
The Annals of Thoracic Surgery  , DOI: ( /S (03) )

3. Fig 2
Partial detachment of endothelium, greater degree of edema, decreased number and irregular distribution of fibroblasts in the leaflets of aortic valves. (Hematoxylin & eosin stain: original magnification ×400.)
The Annals of Thoracic Surgery  , DOI: ( /S (03) )

4. Fig 3
Influence of cold ischemic time on cellular viability. Solid line = gas phase; broken line = liquid phase.
The Annals of Thoracic Surgery  , DOI: ( /S (03) )

5. Fig 4
Influence of storage method used on cellular viability. Triangles = 2 hours; squares = 24 hours.
The Annals of Thoracic Surgery  , DOI: ( /S (03) )