function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Decker, Peter & Reip, Hans Simon & Voigtlaender, Karin', 2],
    ['Enghoff, Henrik', 12],
    ['Fiemapong, Armand Richard Nzoko & Enghoff, Henrik', 5],
    ['Golovatch, Sergei & Vandenspiegel, Didier', 9],
    ['Golovatch, Sergei I. & Wesener, Thomas', 21],
    ['Hollier, John & Stöckli, Eduard & Wesener, Thomas', 11],
    ['Iniesta, Luiz Felipe Moretti & Bouzan, Rodrigo Salvador', 3],
    ['Likhitrakarn, Natdanai & Jirapatrasilp, Parin', 4],
    ['Sankaran, Pradeep M. & Sebastian, Pothalil A.', 2],
    ['Wesener, Thomas', 11],
    ['Wesener, Thomas & Enghoff, Henrik', 10],
    ['Wesener, Thomas & Enghoff, Henrik & Hoffman, Richard L.', 5],
    ['Wesener, Thomas & Enghoff, Henrik & Sierwald, Petra', 45],
    ['Wesener, Thomas & Raupach, Michael J. & Decker, Peter', 2],
    ['de Saussure, H. L. F. & Zehntner, L.', 3],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=152)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);