Nora Volkow is director of the National Institute on Drug Abuse and the lead author of the study.

VOA: special.2009.09.16

Bob Dempsey, at the Johnson Space Center in Texas, is the lead International Space Station flight director for this mission.

VOA: standard.2010.02.18

It will name a "lead director, " another change many top corporate boards have been making.

FORBES: Purcell Hangs On

The board then set up a special committee, led by independent lead director Alex Mandl.

FORBES: Michael Dell, Spurred By 'Reputation, Greed,' Takes Dell Private: 20 Talking Points

The lead director also checked on Dell executives' conversations with would-be buyers to ensure managers were forthcoming about financial information.

WSJ: Dell Director Becomes Middleman in Buyout Battle