To date, four types of HTLVs (human T-lymphotropic virus 1 [HTLV-I], human T-lymphotropic virus 2 [HTLV-II], HTLV-III, and HTLV-IV) and four types of STLVs (STLV-I, STLV-II, STLV-III, and STLV-V) have been identified. HTLV types HTLV-1 and HTLV-2 viruses are the first retroviruses which were discovered. Both belong to the oncovirus subfamily of retroviruses and can transform human lymphocytes so that they are self-sustaining in vitro.
The goal keeper must wear a jersey distinguishable from his team and the opposing team. This is almost always interpreted to mean he must wear a different color.he goal keeper must wear a jersey distinguishable from his team and the opposing team. This is almost always interpreted to mean he must wear a different color.
Only one end of the stick is allowed to be used. Goalies often have a different kind of stick, however they can also use an ordinary field hockey stick. The specific goal-keeping sticks have another curve at the end of the stick, this is to give them more surface area to save the ball. The uniform consists of shin guards, shoes, shorts, a mouth guard and a jersey.