Dr. Ashley Ng, Walter and Eliza Hall Institute of Medical Research (image) Walter and Eliza Hall Institute Share Print E-Mail Caption Dr. Ashley Ng and colleagues from the Walter and Eliza Hall Institute in Melbourne, Australia, have solved a puzzle about how blood-making hormones stimulate the bone marrow to make platelets. The discovery identified how bone marrow cells could become overstimulated and produce too many platelets. In blood diseases such as essential thrombocythemia, too many platelets can lead to clogging of the blood vessels, causing clots, heart attack or strokes. Credit Walter and Eliza Hall Institute of Medical Research Usage Restrictions None Share Print E-Mail 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.