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Keogan, Sheila, Alonso, Tamara, Sunday, Salome ORCID: https://orcid.org/0000-0001-8396-788X, Tigova, Olena, Lopez, Maria José, Gallus, Silvano, Semple, Sean, Tzortzi, Anna, Boffi, Roberto, Gorini, Giuseppe, Lopez-Nicholas, Angel, Hanafin, Joan ORCID: https://orcid.org/0000-0002-8016-2266, Radu-Loghin, Cornel, Soriano, Joan B and Clancy, Luke ORCID: https://orcid.org/0000-0003-2407-2263 (2023) Particle exposure hazards of visiting outdoor smoking areas for patients with asthma or COPD even in EU countries with comprehensive smokefree laws. Preprints.org, 2023020294. doi.org/10.20944/preprints202302.0294.v1.