The time it takes from submission to publication is on average two years. Many authors attribute the lengthy reviewing times to editor and reviewer fatigue. Decision whether the paper will be published or not can be easily delayed by reviewer unavailability. Some fields have a very small pool of experts. Even though journals try to keep a group of loyal reviewers, multidisciplinary publishers have to often reach outside of their list. Multiple rounds of reviews, outsourcing manuscript management or reviewers intentionally delaying the publication for personal reasons are cited as other possible explanations for the long reviewing process (Nguyen 2015). In the age of data-rich papers reviewers are requesting more data, revisions and new experiments than they used to which may cause further delays.