"Resting-state fMRI in Parkinson's disease patients with cognitive impairment: A meta-analysis": Answer to Wang and colleagues. (September 2019) - Wolters, Amée F.; van de Weijer, Sjors C.F.; Leentjens, Albert F.G.; Duits, Annelien A.; Jacobs, Heidi I.L.; Kuijf, Mark L.