function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Darby, Michael', 67],
    ['Ferro, Michael L. & Gimmel, Matthew L. & Harms, Kyle E.', 2],
    ['Ghahari, Hassan', 1],
    ['Gressitt, J. Linsley & Samuelson, G. Allan', 1],
    ['Johnson, Colin', 40],
    ['Majka, Christopher G. & Sörensson, Mikael', 19],
    ['Motschulsky, Victor de', 1],
    ['Sawada, Yoshihiro & Hirowatari, Toshiya', 4],
    ['Sundt, Eivind', 8],
    ['V, Alexey & V, Alexander & Barševskis, Arvids', 1],
    ['komosiński, Karol & Marczak, Dawid', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=145)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);