Authors: M V Mayans; X Calvet; J Bruix; M Bruguera; J Costa; J Estève; F X Bosch; C Bru; J Rodés Journal: Int J Cancer Date: 1990-09-15 Impact factor: 7.396
Authors: E Kaklamani; D Trichopoulos; A Tzonou; X Zavitsanos; Y Koumantaki; A Hatzakis; C C Hsieh; S Hatziyannis Journal: JAMA Date: 1991-04-17 Impact factor: 56.272