Answer key.

Tumor necrosis factor-alpha and the cytokine network in psoriasis. 2012;87(5):673-83.

1- d	6- b	11- a	16- d
2- d	7- b	12- b	17- d
3- c	8- d	13- c	18- a
4- a	9- d	14- c	19- a
5- d	10- a	15- d	20-b