Erratum to: Particle density and transition temperature of weakly interacting quantum gases Renu Bala, Sunita Srivastava and Kare Narain Pathak Eur. Phys. J. B, 89 7 (2016) 160 Published online: 04 July 2016 DOI: 10.1140/epjb/e2016-70349-2