The authors regret a lack of information in Fig. 1 in the final version of the above-mentioned paper. This lack only concerns aesthetic and didactic aspects of Fig. 1, namely the circle around the center of the stabilogram (Fig. 1 c. and d.) and the allocation of the letters ATGC on the grid (Fig. 1 d. and e.). The authors confirm that the change does not affect the substance of the published work. The authors would like to apologise for any inconvenience caused
