Clearstone Hires Quality Assurance Leader

TORONTO, April 6, 2010 - Clearstone Central Laboratories, a leading global provider of clinical
laboratory and centralized cardiac services for clinical trials, today
announced the appointment of Rose Buot as Vice President of Global Quality
Assurance. She will report directly to Clearstone CEO Lewis Cameron and work
from the company's Baillet-en-France laboratory, near Paris, France.

Ms. Buot has a pharmaceutical engineering background with more than 13
years of Quality Assurance experience in the pre-clinical, clinical and
pharmaceutical manufacturing sectors. She is well versed in international
regulatory requirements pertaining to Good Clinical Practice and has a proven
track record in the successful implementation and validation of quality
systems.

"We welcome Rose at an exciting and important time in the development of
our company," said Clearstone CEO Lewis Cameron. "Quality Assurance is a top
priority for us and Rose's knowledge, experience and focused approach will
provide expert leadership to our QA and continuous improvement programs
around the world. Rose's appointment completes the establishment of a
management team at Clearstone of the highest caliber following the purchase
from MDS in November last year, and we look to the future with confidence and
enthusiasm."

About Clearstone Central Laboratories: Clearstone Central Laboratories is
a leading provider of clinical laboratory and centralized cardiac services to
patients enrolled in clinical trials around the world. We employ 550 people
at integrated facilities in Toronto, Paris, Hamburg, Beijing and Singapore.
Clearstone owns and operates the leading edge central laboratory protocol
manager system APOLLO CLPM(TM). Clearstone was formally the Global Central
Laboratory unit of MDS Inc. For more information, visit our website at
www.clearstonelabs.com.

Caroline Keane, +1-905-206-8887, Ext. 4217, caroline.keane at clearstonelabs.com, or Lammert Albers, +44(0)1225-331-375, lammert.albers at clearstonelabs.com, both of Clearstone