11.   Decades of research on a major scale points the finger at cholesterol as one of the key risk factors for heart disease.

12.   Finally, the research on feedback suggested that it had a positive impact on performance because it was instructional.

13.   For example, the Police Foundation is only one of the bodies publishing indices of current research on the police.

14.   For years almost all the research on ability grouping and tracking has demonstrated that it does not deliver the goods as promised.

15.   He hopes that his book will inspire more research on alcoholism.

16.   His studies laid the foundations for his later researches on camphor and the mechanism of aromatic substitution.