function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baycelebi, Esra', 5],
    ['Bayçelebi, Esra & Kaya, Cüneyt & Turan, Davut & Freyhof, Jörg', 2],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 15],
    ['Esmaeili, Hamid Reza & Hamidan, Neshat', 11],
    ['Esmaeili, Hamid Reza & Jufaili, Saud Al & Masoumi, Amir Hassan', 8],
    ['Gong, Zheng & Freyhof, Jörg & Wang, Jian & Liu, Meng & Liu, Fei', 2],
    ['Kirchner, Sandra & Kruckenhauser, Luise & Pichler, Arthur', 5],
    ['Saad, Adib & Çiçek, Erdoğan & Esmaeili, Hamid Reza', 8],
    ['Sayyadzadeh, Golnaz & Esmaeili, Hamid Reza', 16],
    ['Stiassny, Melanie L. J. & Getahun, Abebe', 6],
    ['Sun, Chao & Li, Xu & Zhou, Wei & Li, Fenglian', 7],
    ['Thoni, R. J. & Gurung, D. B. & Mayden, R. L.', 7],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 5],
    ['Çiçek, Erdoğan & Fricke, Ronald & Sungur, Sevil', 3],
    ['Çiçek, Erdoğan & Jawad, Laith & Eagderi, Soheil', 5],
    ['Other (26)', 29]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=134)',
    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);