A method to study the effect of bronchodilators on smoke retention in COPD patients: study protocol for a randomized controlled trial by Klerx W, Lenders JWM, Cremers R, Scheepers PTJ, van Dijk WD, van Weel C, Schermer TRJ, Heijdra Y

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Comparative performance testing of respirator versus surgical mask using a water droplet spray model by Scheepers, PTJ, Wertheim, HFL, van Dael, M, Anzion, R, Holterman, HJ, Teerenstra, S, de Groot, M, Voss, A, Hopman, J