Martín-Merino E, Fortuny J, Rivero-Ferrer E, Lind M, Garcia Rodriguez LA. Risk factors for diabetic macular oedema in type 2 diabetes: a case-control study in a United Kingdom primary care setting. Prim Care Diabetes. 2017 Jun;11(3):288-96. doi: 10.1016/j.pcd.2017.03.002
Martin-Merino E, Fortuny J, Rivero-Ferrer E, Lind M, Garcia-Rodriguez LA. Risk factors for diabetic retinopathy in people with type 2 diabetes: a case-control study in a UK primary care setting. Prim Care Diabetes. 2016 Aug;10(4):300-8. doi: 10.1016/j.pcd.2016.01.002.
Rubino A, Rousculp MD, Davis KL, Wang J, Girach A. Diagnosed diabetic retinopathy in France, Italy, Spain, and the United Kingdom. Prim Care Diabetes. 2007 Jun;1(2):75-80.
Walker EA, Picker MJ, Granger AL, Dykstra LA. Effects of opioids in morphine-treated pigeons trained to discriminate among morphine, the low-efficacy agonist nalbuphine, and saline. J Pharmacol Exp Ther. 2004 Jul;310(1):150-8.
Allen RM, Granger AL, Dykstra LA. The competitive N-methyl-D-aspartate receptor antagonist (-)-6-phosphonomethyl-deca-hydroisoquinoline-3-carboxylic acid (LY235959) potentiates the antinociceptive effects of opioids that vary in efficacy at the mu-opioid receptor. J Pharmacol Exp Ther. 2003 Nov 1;307(2):785-92.
Allen RM, Granger AL, Dykstra LA. Dextromethorphan potentiates the antinociceptive effects of morphine and the delta-opioid agonist SNC80 in squirrel monkeys. J Pharmacol Exp Ther. 2002 Feb 1;300(2):435-41.