function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Dall, William Healey', 1],
    ['Hryniewicz, Krzysztof & Amano, Kazutaka', 3],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 4],
    ['Kolpakov, E. V. & Volvenko, I. Е.', 1],
    ['Lam, Katherine & Morton, Brian & Leung, K. F.', 1],
    ['Mead, A. & Carlton, J. T. & Griffiths, C. L. & Rius, M.', 1],
    ['Negri, Mauro Pietro & Corselli, Cesare', 1],
    ['Pacaud, Jean-Michel', 1],
    ['Petit, Richard E.', 1],
    ['Raines, Bret & Huber, Markus', 2],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 1],
    ['Zelaya, Diego G. & Güller, Marina', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);