Organ and tissue transplantation in the European Union : management of difficulties and health risks linked to donors / ed. by Yvon EnglertHet menselijk embryo in vitro / Y. Englert & A. Van Orshoven (red.)' Levenstestament' en andere voorafgaande wilsverklaringen / Alfons Van Orshoven & Yvon Egbert [i.e. Englert] (red.)