This article by T Shane Topham, Gail E Bingham and Harri Latvakoski (Utah State University Research Foundation, North Logan, UT, USA), Igor Podolski and Vladimir S Sychev (Institute of Biomedical Problems of the Russian Academy of Sciences (SSCRF-IBMP RAS), Moscow, Russia) and Andre Burdakin (Russian Scientific Research Institute for Optical and Physical Measurements (VNIIOFI), Moscow, Russia) was published online by npj Microgravity on August 20, 2015.

This article by Carlos Luna and Adam H Hsieh (University of Maryland, College Park, MD, USA) and Alvin G Yew (NASA Goddard Space Flight Center, Greenbelt, MD, USA) was published online by npj Microgravity on 30 July, 2015.