(This story has been posted on The Wall Street Journal Online's Health Blog at http://blogs.wsj.com/health.) By Stefanie Ilgenfritz Here's what's making health news this morning: NFL Retirees File Single Suit for Head Injuries (WSJ): In the complaint, lawyers for more than 2,300 retired players in 86 suits alleged that for decades the NFL hid the risks of such injuries and ignored mounting evidence of the long-term effects that football-related concussions can have, including dementia and chronic depression. Pfizer Prepares for IPO of Animal Health Unit (WSJ): The New York drug maker also disclosed a new name for the animal-health business, Zoetis, which Pfizer said is based on the root "zo" found in animal-related words such as zoo and zoology. Former Coke Executive Slams 'Share of Stomach' Marketing Campaign (Washington Post): Todd Putnam, a former marketing executive at Coca-Cola, now regrets his work and says it contributed to the nation's obesity problem. 6.6 Million Young Adults on Parents' Health Plans, Survey Says (LA Times): That number, found in a survey by the nonprofit Commonwealth Fund, is far higher than earlier estimates. Arizona Tries to Keep Reins Tight as It Starts Regulating Medical Marijuana (NY Times): In Arizona, dispensaries have to abide by zoning regulations that change from one municipality to the next; applicants must offer detailed plans on how to secure, store and track the marijuana; and they have to offer educational materials and hire a medical director to supervise. Suicide Among U.S. Troops Averaging One a Day in 2012 (USA Today): The 154 suicides for active-duty troops in the first 155 days of the year far outdistance the U.S. forces killed in action in Afghanistan -- about 50% more -- according to Pentagon statistics obtained by the Associated Press. -For continuously updated news from The Wall Street Journal, see WSJ.com at http://wsj.com.