Characteristic	Study author contacted [DD/MM/YY]	Study author replied [DD/MM/YY]	Study author asked for additional information [short summary]	Study author provided data [short summary]
Study 1	Yes, date:	Yes, date: / No
Study 2	Yes, date:	Yes, date: / No
Study 3	Yes, date:	Yes, date: / No
Study 4	Yes, date:	Yes, date: / No
N/A: not applicable.