ZURICH (October 29, 2012)—Doctors from the U.S. and other countries meet later this week to discuss the safest ages to begin playing tackle football at the Consensus Conference on Concussion.

More than 100 medical experts from around the world, including leading U.S. doctors Stanley Herring and Robert Cantu, will take part Thursday and Friday.

Herring serves as the director of sports spine and orthopedic health at University of Washington Medicine and was a leader in getting the state's landmark Zackery Lystedt Law passed in 2009.

Cantu is a neurosurgeon and concussion expert at Boston University's medical school and has been published widely on the topic of concussions.

He supports not allowing children younger than 14 to practice tackle football, heading in soccer and body checking in hockey.