Fig. 2From: Grouping MWCNTs based on their similar potential to cause pulmonary hazard after inhalation: a case-studyIL-1β release from differentiated THP-1 cells exposed to source (NRCWE006) and target (NM-401) MWCNT for 24 h measured by ELISA (n = 3). NRCWE040, NRCWE041, NRCWE042, NRCWE043, NRCWE045, NRCWE046 and NRCWE048 are included for comparison with MWCNT which are not included in the groupBack to article page