Anxiety is both a mental and physical state of negative expectation. Mentally it is characterized by increased arousal and apprehension tortured into distressing worry, and physically by unpleasant ...

Graphene is a two-dimensional material consisting of a single layer of carbon atoms arranged in a honeycomb structure. Its properties include high strength and good conductivity of heat and ...

Myasthenia gravis usually does not shorten life expectancy, but severe muscle weakness that affects breathing can be life threatening. Myasthenia gravis symptoms may begin suddenly and often progress ...