function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Andrei E. Humala & H. Marjolein Kruidhof & Jozef B. Woelke', 2],
    ['Broad, Gavin R.', 16],
    ['Ghahari, H. & Jussila, R.', 1],
    ['Kolarov, J.', 2],
    ['Riedel & Pénigot & Schwarz & Diller & Johansson & Japoshvili, G.', 8],
    ['Rousse, Pascal & Villemant, Claire', 1],
    ['Schiodte, Georgius', 6],
    ['Watanabe, Kyohei', 6],
    ['Zhang, Shu-Jie & Zhou, Qing & Li, Tao & Sheng, Mao-Ling', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);