The practice of drawing blood has changed very little over the decades. It looks about the same now as it did 50 years ago.

A McMaster team collaborated with Brazilian scientists to conduct an untargeted metabolomic analysis of blood samples taken from more than 5,000 children between the ages of six months and five ...

If a patient or research study volunteer is having a blood draw at or near a research facility ... at Baylor College of Medicine and Texas Children's Hospital who collaborates with researchers ...