2011a-659 adverseeffects behandelingsmethoden blooddiseasesinpregnancy chirurgie(geneeskunde) complications control diseases genitourinaryorgans grossesse gynaecologie gynecology hematologicdiseases hematologicpregnancycomplications hematologie hematology high-risk intraoperativecomplications medical obstetrics postoperativecomplications pregnancy pregnancycomplications prevention risico's surgery urologicsurgicalprocedures urologie verloskunde wq240h63772011 zwangerschap