function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dawah, Hassan A. & Abdullah, Mohammed A. & Ahmad, Syed Kamran', 1],
    ['El-Hawagry, Magdi S. & Gilbert, Francis', 3],
    ['Fabricius, Johann Christian', 2],
    ['Kočić, Anja & Vujić, Ante & Tot, Tamara', 3],
    ['Lorenzo, Daniel & Ricarte, Antonio & Nedeljković, Zorica', 1],
    ['MAZáNEK, Libor & VONIČKA, Pavel & PREISLER, JiřÍ', 2],
    ['Meigen, Johann Wilhelm', 1],
    ['Montoya, Augusto L.', 4],
    ['Noel, Gregoire & Bonnet, Julie & Everaerts, Sylvain', 1],
    ['Ricarte, Antonio & Nedeljković, Zorica & Rotheray, Graham E.', 3],
    ['Ricarte, Antonio & Rotheray, Graham E. & Lyszkowski, Richard M.', 2],
    ['Samin, Najmeh & Sakenin, Hamid', 2],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);