摘要：In the originally published paper, there was a typographical error in Table 2 under the column for distances (in Rows 2-5). It is now corrected online and should read as follows: for Row 2: H3eq Neu5Ac-H6S Gal; Row 3: H3eq Neu5Ac -H6R Gal, Row 4: H3ax Neu5Ac -H6S Gal and Row 5: H3ax Neu5Ac -H6R Gal. The authors apologize for this error.
