Marco Hafner und Wendy Person-Info 

( Ich bin Marco Hafner)
(1 - 18 von 21
)

Americans don't sleep enough, and it's costing us $411 billionDelaware Online

www.delawareonline.com
— Marco Hafner & Wendy M. Troxel. Myriad business executives and heads of state have said they get by on little to no sleep. › opinion ›

Op-Ed: If teenagers get more sleep, California could gain billions

www.latimes.com
— Op-Ed: If teenagers get more sleep, California could gain billions. By Wendy M. Troxel and Marco Hafner. Sept. 7, AM PT. › op-ed
+1