Gert Jan Scheffer

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BACKGROUND AND OBJECTIVES This study was performed to determine the minimum effective volume of ropivacaine 0.75% required to produce effective shoulder analgesia for an ultrasound (US)-guided block(More)
BACKGROUND The cause of declining fertility with age, in women who still have regular menstrual cycles, is not clear. METHODS Follicle development, endometrial growth and hormonal patterns were(More)
OBJECTIVE To assess the intra- and interobserver reproducibilities in addition to the between-method reliability of antral follicle counts using two (2D)- and three (3D)-dimensional transvaginal(More)
BACKGROUND Mechanical ventilation (MV) may activate the innate immune system, causing the release of cytokines. The resulting proinflammatory state is a risk factor for ventilator-induced lung(More)