Validation of spontaneous morphine withdrawal symptoms in ratsJW Laan, C Jansen van 't Land, JG Loeber, G Groot17/12/1991Journal Article
Local immunopotentiation after intravesical BCG therapy for superficial bladder cancerEC Boer18/12/1991Journal Article
Molecular characterization of Treponema pallidum protein antigens and their use in the serodiagnosis of syphilisLM Schouls31/12/1991Journal Article