- Portal hypertensive gastric mucosa has reduced activation of MAP kinase (ERK2) in response to alcohol injury: a key to impaired healing? Kawanaka, H., Tomikawa, M., Jones, M.K., Pai, R., Szabo, I.L., Sugimachi, K., Sarfeh, I.J., Tarnawski, A.S. FASEB J. (2001)