Appropriate communication formats between researchers

We were surprised to see yet another Letter-to-the-Editor from Arumugam and colleagues recently sent to this journal (Arumugam, 2016; Arumugam and Chandrasekaran, 2019; Arumugam et al., 2020). For their Letter in response to our review (Klerx et al., 2019), we believe direct communication to the corresponding author would have sufficed for most elements. The content of Letters-to-the-Editor can then be reserved for pertinent discussions of interest to the broad readership of the journal.