RT Journal Article SR Electronic T1 Limitations of a 6-min walk test to assess the efficacy of menthol for breathlessness JF ERJ Open Research JO erjor FD European Respiratory Society SP 00090-2022 DO 10.1183/23120541.00090-2022 VO 8 IS 2 A1 Masashi Kanezaki A1 Satoru Ebihara YR 2022 UL http://openres.ersjournals.com/content/8/2/00090-2022.abstract AB