Major League Soccer (MLS) is a men's professional soccer league sanctioned by U.S. Soccer that represents the sport's highest level in both the United States and Canada. MLS constitutes one of the major professional sports leagues of the United States and Canada. The league comprises 23 teamsâ20 in the U.S. and 3 in Canada.
Most blood collection in the US, UK and Hong Kong is done with an evacuated tube system, (two common systems are Vacutainer (Becton, Dickinson and company) and Vacuette (Greiner Bio-One GmbH). The equipment consists of a plastic hub, a hypodermic needle and a vacuum tube.
Safety transfer devices are used to protect the phlebotomist from an accidental needle stick when transferring blood from a syringe to the vacuum tubes. The syringe is attached to the top of the device, the tubes are then inserted into the holder until the stopper is punctured by the needle inside the holder.