function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beyarslan, Ahmet & Fischer, Maximilian', 1],
    ['Dolati, Sana & Talebi, Ali Asghar', 2],
    ['Gadallah, Neveen S. & Ghahari, Hassan', 3],
    ['Gupta, Ankita & Achterberg, Cornelis Van & Pattar, Rohit', 1],
    ['Han, Yunjong & van Achterberg, Cornelis & Kim, Hyojoong', 6],
    ['Han, Yunjong & van Achterberg, Cornelis & Lee, Heung-Sik', 3],
    ['Khajeh, Nahid & Rakhshani, Ehshan', 2],
    ['Li, Xi-Ying & Achterberg, Cornelis van & Tan, Ji-Cai', 4],
    ['Wu, Qiong & Achterberg, Cornelis van & Sheng, Ying-yi', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);