Molecular portraits of human breast tumours Charles M. Perou , Thérese Sørlie , Michael B. Eisen +15 more 2000 Nature 15965 citations
The validity of the Hospital Anxiety and Depression Scale Ingvar Bjelland , Alv A. Dahl , Tone Tangen Haug +1 more 2002 Journal of Psychosomatic Research 9473 citations