TY - JOUR AU - Ho, J C; Chan, K N; Hu, W H TI - The effect of aging on nasal mucociliary clearance, beat frequency, and ultrastructure of respiratory cilia JO - Am J Respir Crit Care Med IS - 04 VL - 163 PY - 2001 DO - 10.1164/ajrccm.163.4.9909121 L3 - PubMed-ID: 11282777 SP - 983 EP - 988 ER -