function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bojková, Jindřiška & Soldán, Tomáš & Cr, Biology Centre As', 2],
    ['Cherchesova, S. K & Shioloshvili, M. N & Yakimov, A. V.', 1],
    ['Darilmaz, Mustafa Cemal & Salur, Ali & Murányi, Dávid', 2],
    ['DeWalt, R. Edward & Grubbs, Scott A.', 2],
    ['Judson, Sarah W. & Nelson, C. Riley', 4],
    ['Li, Weihai & Wang, Guoquan', 4],
    ['Newell, Robert L. & Baumann, Richard W.', 1],
    ['Qian, Yu-Han & Xiang, Jin-Hong & Jiao, Jun-Ying & Du, Yu-Zhou', 1],
    ['Stark, Bill P. & Sivec, Ignac', 1],
    ['Tarter, Donald C. & Chaffee, Dwight L. & Grubbs, Scott A.', 1],
    ['Verdone, Chris J. & Kondratieff, Boris C. & DeWalt, R. Edward', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);