Original sentence: Accordingly, it may not  have been Arvid Carlsson who had discovered that dopamine is a signal substance in the central nervous system, as stated by the Nobel Committee at the Karolinska Institute in a press release (länk.However, Carlsson, Falck and Hillarp published a study in 1962, which was based on the Falck-Hillarp fluorescence method on the cellular location of noradrenaline and dopamine in the brain, showing that noradrenaline is located in nerve cells (neurons) and functions as a transmitter.Presumably, if Carlsson had discovered this in 1957–1958, it would have been referred to and extensively discussed in the Carlsson-Falck-Hillarp publication in 1962
Edited sentence: Accordingly, it was not Arvid Carlsson who had discovered that dopamine is a signal substance in the central nervous system, as stated by the Nobel Committee at the Karolinska Institute in a press release (länk.In reality, Carlsson, Falck and Hillarp published a study in 1962, which was based on the Falck-Hillarp fluorescence method on the cellular location of noradrenaline and dopamine in the brain, showing that noradrenaline is located in nerve cells (neurons) and functions as a transmitter.It goes without saying that, if Carlsson had discovered this in 1957–1958, it would have been referred to and extensively discussed in the Carlsson-Falck-Hillarp publication in 1962