A. “Estrogen receptor-a expression in neuronal cells affects bone mass,” by Claes Ohlsson, Cecilia Engdahl, Anna E. Börjesson, Sara H. Windahl, Erik Studer, Lars Westberg, Elias Eriksson, Antti Koskela, Juha Tuukkanen, Andree Krust, Pierre Chambon, Hans Carlsten, and Marie K. Lagerquist (Vol. 109, No. 3, Jan. 17, 2012, p. 983-988).
www.pnas.org/cgi/content/abstract/109/3/983?etoc
B. “Variation in cognitive functioning as a refined approach to comparing aging across countries,” by Vegard Skirbekk, Elke Loichinger, and Daniela Weber (Vol. 109, No. 3, Jan. 17, 2012, p. 770-774).
