(Chapter 19) Footnote 55:

Here again, without Balamio’s Latin translation of De ossibus it is impossible to tell what Vesalius found in his version of Galen. The Greek text does not discuss the joining of bones that make up the sternum, saying only that the ribs are joined to parts of the sternum by synarthroses (§763), and a little later that the diarthroses by which the ribs are joined to the sternum are so rigid that they are almost synarthroses (§764). Galen enumerates the three varieties of synarthrosis in §737. It is worth noting that although the Greek text of De ossibus was published in Paris in the same year as Vesalius’ 1543 Fabrica, Vesalius did not alter his mistaken criticism of Galen in the 1555 edition.