The Lancet : a journal of British and foreign medicine, surgery, obstetrics, fysiology, chemistry, pharmacology, public health and news Zv. 2: Vol. 357 no. 9258-9265 2001. The Lancet London : Lancet, 2001. s. 731-1377ISSN 0140-6736 [1, z toho volných 0, prezenčně 1]