Morgan et al. Respond

Clayton et al. respond.

Lusk et al. respond.

We thank Schimek for his thoughtful letter. We agree that the American Association of State Highway and Transportation Officials (AASHTO) encourages bike paths; however, AASHTO’s definition of a bike path is a shared use path for pedestrians, skaters, wheelchair users, joggers, and other nonmotorized users. AASHTO discourages bicycle-only cycle tracks because, as noted by Schimek, AASHTO discou...

Clinician's Commentary on Morgan et al.1

Airway-clearance treatments (ACTs) are an integral part of the physiotherapy treatment regimen for people with cystic fibrosis, along with inhalation therapy and exercise. Autogenic drainage (AD) is an ACT that can be performed without either assistance or equipment, which makes it an attractive option for airway clearance for many people. In clinical practice, AD is often the treatment of choi...

Nanotoxicology: Gangwal et al. Respond

Gangwal et al. (2011) addressed an important topic for nanotoxicology about assessing the toxicity of inhaled nano materials by recom mending relevant concentrations for in vitro toxicity testing. Their efforts to select in vitro concentrations based on reported occupational exposure levels of inhaled nano materials are, indeed, laudable. Their under lying conceptual approach is logical, involv...

“Phthalates”: Kelley et al. Respond