1. Spread of coagulase-negative staphylococci during cardiac operations in a modern operating room 
Catarina Y Bitkover, MD, PhD, Eva Marcusson, Ulrika Ransjö, MD, PhD 
The Annals of Thoracic Surgery 
Volume 69, Issue 4, Pages (April 2000)
DOI: /S (99)

2. Fig 1
Pulsed-field gel electrophoresis. Lanes run vertically. Lanes 3, 11, and 9 contain lambda ladder. The origins of the isolates are given in Table 2.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )