Transthyretin amyloidosis is a slowly progressive condition characterized by the buildup of abnormal deposits of a protein called amyloid (amyloidosis) in the body's organs and tissues.
If you play tennis, you may be familiar with the different racket customizing choices you have -- common choices include string type, gauge and tension. Not so common is an inexpensive device called a shock absorber or vibration dampener. These devices have no impact on your performance, but some players can't play without one. It's a personal choice, and if you do use a dampener, its placement must comply with the rules of the International Tennis Federation.
For court position, the opposite side of the body from the player's racket hand. For strokes, any shot hit with the back of the racket, which is the side of the racket facing toward the racket hand with normal grip. For right handed player holding the racket ahead the right side of the racket is the back of the racket and the court to the player's left is the backhand side.