The American Society for Reproductive Medicine published a report that concludes preimplantation genetic testing for ...

Denali Therapeutics' experimental drug for amyotrophic lateral sclerosis (ALS) failed to show efficacy in part of the phase 2/3 HEALEY ALS basket trial, causing a fall in its share price. The South ...

This encyclopedic article outlines evidence-based laboratory tests that are most useful for establishing individualized ...

Klinefelter syndrome is the most common sex-chromosome disorder; it affects approximately one in every 660 men. This syndrome is characterized by the presence of one or more extra X chromosomes, and ...

Try this quiz based on GCSE Geography past papers. Choose the topic you would like to revise and answer the questions. By working your way through the questions created by experts, you can prepare for ...

B1 Set of model exercises for adults (PDF, 887 kB) B1 Set of model exercises for adults -- play the listening module sample audio (37:21 min.) 00:00 00:00 B1 Set of model exercises for adults -- ...