Niels Henrik Hjøllund

Relation between semen quality and fertility: a population-based study of 430 first-pregnancy planners

Jens Peter Bonde, Erik Ernst, Tina Kold Jensen et al. · The Lancet · 1998 · 781 citations

Pregnancy Prevention, Family Medicine, Infertility +13

Register-based follow-up of social benefits and other transfer payments: Accuracy and degree of completeness in a Danish interdepartmental administrative database compared with a population-based survey

Niels Henrik Hjøllund, Finn Breinholt Larsen, Johan Hviid Andersen · Scandinavian Journal of Public Health · 2007 · 466 citations

Response Rate and Completeness of Questionnaires: A Randomized Study of Internet Versus Paper-and-Pencil Versions

Sissel Marie Kongsved, Maja Basnov, Kurt Holm-Christensen et al. · Journal of Medical Internet Research · 2007 · 409 citations · Full text

Maximising the impact of patient reported outcome assessment for patients and society

Melanie Calvert, Derek Kyte, Gary Price et al. · BMJ · 2019 · 345 citations · Full text

Family Medicine, Efficient Coordinated Approach, Care Coordination +23

Inhibin B as a Serum Marker of Spermatogenesis: Correlation to Differences in Sperm Concentration and Follicle-Stimulating Hormone Levels. A Study of 349 Danish Men¹

Tina Kold Jensen, Anna‐Maria Andersson, Niels Henrik Hjøllund et al. · The Journal of Clinical Endocrinology & Metabolism · 1997 · 300 citations · Full text

Spermatogenesis, Blood Samples, Fertility +23