function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chatterjee, Tapas', 7],
    ['Chatterjee, Tapas & Durucan, Furkan', 4],
    ['Chatterjee, Tapas & Pfingstl, Tobias & Pešić, Vladimir', 6],
    ['Durucan, Furkan', 2],
    ['Durucan, Furkan & Chatterjee, Tapas & Pešić, Vladimir', 2],
    ['Erman, Orhan & Gülle, Pinar & Özkan, Muhlis & Candoğan, Hülya', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 3],
    ['Montes-Ortiz, Lucia & Goldschmidt, Tom', 1],
    ['Pesic, Vladimir & Chatterjee, Tapas & Alfaro, Monica', 1],
    ['Pesic, Vladimir & Smit, Harry', 1],
    ['Pešić, Vladimir', 5],
    ['Pešić, Vladimir & Bańkowska, Aleksandra & Goldschmidt, Tom', 2],
    ['Pešić, Vladimir & Durucan, Furkan & Zawal, Andrzej', 2],
    ['Smit, H. & Gerecke, R.', 2],
    ['Wiles, P. R. & Chatterjee, Tapas & Troch, Marleen De', 3],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    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);