[Table 0](#T0){ref-type="table"}).  ###### Chronological changes of PDA and PDA-induced enlarged structures of aortic valve, aorta, and left atrium (represented as medians with quartiles)  ![](jkms-00-e000-i000)    Variables              0--00 hr                  00--00 hr              00--00 hr                                                              ---------------------- ------------------------- ---------------------- ---------------------- --------------------- ---------------------- ----------   