Reply: From the authors of the ERS/ATS statement on the international multidisciplinary classification of the interstitial pneumonias.

Andrew G Nicholson, Ayodeji Adegunsoye, Sara Piciucchi, Lida P Hariri, Yet H Khor, Marlies S Wijsenbeek, Athol U Wells, Amita Sharma, Wendy A Cooper, Katerina Antoniou, Raphael Borie, Aurelie Fabre, Yoshikazu Inoue, Kerri A Johannson, Takeshi Johkoh