function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballarin, Francesco & Eguchi, Katsuyuki', 7],
    ['Ballarin, Francesco & Koponen, Seppo & Blick, Theo', 1],
    ['Grall, Elena & Jäger, Peter', 6],
    ['Lin, Yucheng & Ballarin, Francesco & Li, Shuqiang', 43],
    ['Liu, Jie & Li, Shuqiang', 9],
    ['Omelko, M. M. & Fomichev, A. A.', 1],
    ['Saaristo, Michael I.', 1],
    ['Trilikauskas, L. A. & Sergeev, M. E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=69)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);