function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abbate, Daniel & Cavallari, Daniel', 1],
    ['Cho, Sungha & Yang, Inho & Khim, Jong Seong & Park, Jinsoon', 1],
    ['Gurumayum, S. D.', 1],
    ['Harzhauser, Mathias & Cernohorsky, Walter', 3],
    ['Harzhauser, Mathias & Kowalke, Thorsten', 2],
    ['Kool, H & Dekker, Henk', 7],
    ['Negri, Mauro Pietro & Corselli, Cesare', 1],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 1],
    ['Zhang, Junlong & Zhang, Suping', 1],
    ['Zvonareva, Sofya & Kantor, Yuri', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);