function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cho, Kyuhee & Kim, Jong Guk & Lee, Jimin', 1],
    ['Gee, J. M. & Mu, F-H.', 2],
    ['George, Kai Horst', 6],
    ['Gómez, Samuel & Nazari, Fatemeh', 2],
    ['Karanovic, Tomislav & Kim, Kichoon & Lee, Wonchoel', 3],
    ['Karaytuǧ, Süphan & Huys, Rony', 4],
    ['Kim, Jong Guk & Jung, Tae Won & Yoon, Seong Myeong', 1],
    ['Ma, Lin & Liu, Qing He & Li, Xin Zheng & Huys, Rony', 3],
    ['Novikov, Aleksandr & Sharafutdinova, Dayana', 1],
    ['Wells, J. B. J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);