On 2015 Jul 14, Marco Weiergräber commented:

A comment has been posted on Pubpeer on this publication in Epilepsy Research refused to publish a letter to the editor from my site. The authors use a transmitter out of its technical specifications, i.e. the transmitter bandwidth is 1-50Hz, the nominal sampling rate 250 Hz. Theoretically, frequency reconstruction is possible up to 125 Hz (see Nyquist-Shannon sampling limit). However, the authors analyze up to 500Hz. This is simply not possible and not correct.

On 2015 Jul 14, Marco Weiergräber commented:

A comment has been posted on Pubpeer on this publication in Epilepsy Research refused to publish a letter to the editor from my site. The authors use a transmitter out of its technical specifications, i.e. the transmitter bandwidth is 1-50Hz, the nominal sampling rate 250 Hz. Theoretically, frequency reconstruction is possible up to 125 Hz (see Nyquist-Shannon sampling limit). However, the authors analyze up to 500Hz. This is simply not possible and not correct.