function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, W.', 19],
    ['Boustani, Mira & Rosa, Paolo', 2],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 4],
    ['Paukkunen, Juho & Berg, Alexander & Soon, Villu', 4],
    ['Paukkunen, Juho & Rosa, Paolo & Soon, Villu & Johansson, Niklas', 5],
    ['Rosa, P.', 1],
    ['Rosa, Paolo', 1],
    ['Rosa, Paolo & Forshage, Mattias & Paukkunen, Juho & Soon, Villu', 2],
    ['Rosa, Paolo & Greeff, Michael', 2],
    ['Rosa, Paolo & Heim, René & Bernasconi, Marco Valerio', 18],
    ['Rosa, Paolo & Proshchalykin, Maxim Yu. & Halada, Marek', 2],
    ['Rosa, Paolo & Vardal, Hege', 3],
    ['Rosa, Paolo & Wei, Na-sen & Xu, Zai-fu', 17],
    ['Rosa, Paolo & Wisniowski, Bogdan & Xu, Zai-fu', 2],
    ['Wei, Na-sen & Rosa, Paolo & Xu, Zai-fu', 18],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=103)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);