The bowler hat sign
Crossref DOI link: https://doi.org/10.1007/s00261-017-1277-2
Published Online: 2017-08-02
Published Print: 2018-05
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Yu, Man Leung https://orcid.org/0000-0002-7073-8663
Wong, Ho Yuen
Lee, Kam Ho
License valid from 2017-08-02
