function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Brunetti, Mauro & Forli, Maurizio', 1],
    ['Calzada, Sebastián & Forner, Enric', 1],
    ['Da Costa, Emanuel Mendes', 1],
    ['Hansen, Thomas', 2],
    ['Hryniewicz, Krzysztof & Amano, Kazutaka', 2],
    ['Kaim, Andrzej & Jenkins, Robert G. & Tanabe, Kazushige', 1],
    ['Lin, Yucheng & Li, Shuqiang & Jaeger, Peter', 4],
    ['Rosenkrantz, Alfred', 2],
    ['Zhao, Qingyuan & Li, Shuqiang', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);