function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, W.', 12],
    ['Madl, M. & Rosa, P.', 6],
    ['Madl, Michael', 2],
    ['Rosa, P. & Halada, M. & Proshchalykin, M. Yu.', 3],
    ['Rosa, P. & Proshchalykin, M. Yu. & Lelej, A. S.', 3],
    ['Rosa, Paolo & Gadallah, Neveen S. & Brothers, Denis J.', 3],
    ['Rosa, Paolo & Proshchalykin, Maxim Yu. & Halada, Marek', 3],
    ['Rosa, Paolo & Wei, Na-sen & Xu, Zai-fu', 2],
    ['Rosa, Paolo & Wisniowski, Bogdan & Xu, Zai-fu', 1],
    ['Rosa, Paolo & Xu, Zai-fu', 3],
    ['Yildirim, E. & Strumia, F.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    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);