Incidence of Injury for Professional Soccer Players in the United States: A 6-Year Prospective Study of Major League Soccer.

Background: Despite an abundance of injury research focusing on European professional soccer athletes, there are limited injury data on professional soccer players in the United States.

Purpose: To describe the epidemiology of injury across multiple years in Major League Soccer (MLS) players.

Study Design: Descriptive epidemiology study.

The perceptions of professional soccer players on the risk of injury from competition and training on natural grass and 3rd generation artificial turf.

Background: The purpose of this study was to describe professional soccer players' perceptions towards injuries, physical recovery and the effect of surface related factors on injury resulting from soccer participation on 3rd generation artificial turf (FT) compared to natural grass (NG).

Methods: Information was collected through a questionnaire that was completed by 99 professional soccer players from 6 teams competing in Major League Soccer (MLS) during the 2011 season.

Results: The majority (93% and 95%) of the players reported that playing surface type and quality influenced the risk of sustaining an injury.

Who deserves the credit for discovering ether's use as a surgical anesthetic?

This paper discusses the controversy based around the discovery of inhalation anesthesia. Although many contributors claim to be the discoverer, deeper research into the events leading to anesthesia can award credit to a select few. It can be determined that anesthesia in animals was discovered by Paracelsus back in the fifteenth century and that the first person to demonstrate ether's use as a surgical anesthetic was Dr.