Rikkert van der Valk

Intermittent administration of iron and sulfadoxine-pyrimethamine to control anaemia in Kenyan children: a randomised controlled trial

Hans Verhoef, Clive E. West, Silas M. Nzyuko et al. · The Lancet · 2002 · 107 citations

Anemia, Nutrition, Pediatric Hematology +9

Corneal Cross-linking for Treatment of Progressive Keratoconus in Various Age Groups

Nienke Soeters, Rikkert van der Valk, Nayyirih G. Tahzib · Journal of Refractive Surgery · 2014 · 105 citations

Effective corneal collagen crosslinking in advanced cases of progressive keratoconus

Frea Sloot, Nienke Soeters, Rikkert van der Valk et al. · Journal of Cataract & Refractive Surgery · 2013 · 96 citations

A network meta-analysis combined direct and indirect comparisons between glaucoma drugs to rank effectiveness in lowering intraocular pressure

Rikkert van der Valk, Carroll A.B. Webers, Thomas Lumley et al. · Journal of Clinical Epidemiology · 2009 · 78 citations

Network Meta-analysis, Hypertension, Ocular Disease +9

Side effects of commonly used glaucoma medications: comparison of tolerability, chance of discontinuation, and patient satisfaction

Henny J. M. Beckers, Jan Schouten, Carroll A.B. Webers et al. · Graefe s Archive for Clinical and Experimental Ophthalmology · 2008 · 76 citations · Full text