U.S. National Library of Medicine

One of the first successful operations to separate craniopagus twins took place in 1956, according to the U.S. National Library of Medicine.

U.K. surgeons separate twin girls joined at head 2011

The U.S. National Library of Medicine estimates that at least one out of five children in the U.S. is overweight.

Joanna Dolgoff, M.D.: How Parents Can Help Their Kids Overcome Obesity M.D. Joanna Dolgoff 2011

For an ECG test, small patches called electrodes are put on the skin in several places on the body and attached by wires to a machine that will print out wavy lines that indicate the heart's electrical activity, according to the U.S. National Library of Medicine.

Screening teens' hearts could be lifesaving 2011

For an ECG test, small patches called electrodes are put on the skin in several places on the body and attached by wires to a machine that will print out wavy lines that indicate the heart's electrical activity, according to the U.S. National Library of Medicine.

Screening teens' hearts could be lifesaving 2011

The U.S. National Library of Medicine estimates that at least one out of five children in the U.S. is overweight.

Joanna Dolgoff, M.D.: How Parents Can Help Their Kids Overcome Obesity M.D. Joanna Dolgoff 2011

Brian was a longtime ABC News correspondent, Ellen a photographer and Martha Fishel is chief of the public service division of the U.S. National Library of Medicine.

Andy Rooney Dead: Former '60 Minutes' Commentator Dies At 92 Years Old 2011

More information: www.nlm.nih.gov, the U.S. National Library of Medicine has more on pain relievers.

Study: Certain painkillers might raise odds of stroke, heart attack 2011

I worked as an assistant to a medical researcher, which gave me access to PubMed the U.S. National Library of Medicine search service and allowed me to read articles about the relationship between high BMI and spontaneous labor.

The Official Lamaze® Guide Judith Lothian RN 2010

Building on the successful PubMed Central archive developed by the U.S. National Library of Medicine, PMC Canada will help accelerate the creation of knowledge and facilitate its use by providing a freely accessible, Canada-based archive of peer-reviewed health science literature.

September 2009 2009

Building on the successful PubMed Central archive developed by the U.S. National Library of Medicine, PMC Canada will help accelerate the creation of knowledge and facilitate its use by providing a freely accessible, Canada-based archive of peer-reviewed health science literature.

PMC Canada: Making Canadian health research accessible to all 2009