Tanner and Awinda (IMAGE) Washington State University Caption Associate professor Bert Tanner (right) watches as laboratory manager Peter Awinda (left) performs a solution exchange to increase the calcium concentration applied to human cardiac tissue. Credit WSU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.