Relative hyperventilation in non-ventilated patients with spinal muscular atrophy.

Competing Interests: Conflict of interest: E.S. Veldhoen has nothing to disclose. Conflict of interest: C.A. Wijngaarde has nothing to disclose. Conflict of interest: L.P. Verweij-van den Oudenrijn has nothing to disclose. Conflict of interest: F-L. Asselman has nothing to disclose. Conflict of interest: R.M. Wösten-van Asperen has nothing to disclose. Conflict of interest: E.H.J. Hulzebos has nothing to disclose. Conflict of interest: K. van der Ent has nothing to disclose. Conflict of interest: I. Cuppen has nothing to disclose. Conflict of interest: M.A. Gaytant has nothing to disclose. Conflict of interest: R.P.A. van Eijk has nothing to disclose. Conflict of interest: W.L. van der Pol reports grants from Prinses Beatrix Spierfonds and Stichting Spieren voor Spieren, fees for consultancy from Biogen and Avexis, fees for data monitoring committee work from Novartis, outside the submitted work; and is local PI of industry-sponsored trials (TOPAZ, Scholar Rock and Jewelfish, Roche).