Serum angiogenin levels are elevated in ALS, but not Parkinson's disease. Issue 12 (29th May 2014) - van Es, Michael A; Veldink, Jan H; Schelhaas, Helenius J; Bloem, Bastiaan R; Sodaar, Peter; van Nuenen, Bart F L; Verbeek, Marcel; van de Warrenburg, Bart P; van den Berg, Leonard H