Fig. 3: Ductal lavage related pain score evaluated by visual analogue scale in ductal lavage followed by observation group.

Over the total five ductal lavage sessions, the missing records were caused by the following reasons: rejected to receive randomized ductal lavage followed by observation (n = 2), suspicious allergy (no records at all, n = 1; only recorded session 1, n = 1), only received 2 sessions since feeling alleviation of symptoms (n = 1), only received 3 sessions due to personal reason (n = 1), and missing recording of session 2 (n = 1). Source data are provided as a Source Data file.