function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baycelebi, Esra', 5],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 6],
    ['Esmaeili, Hamid Reza & Jufaili, Saud Al & Masoumi, Amir Hassan', 2],
    ['Freyhof, Jörg & Yoğurtçuoğlu, Baran', 2],
    ['Saad, Adib & Çiçek, Erdoğan & Esmaeili, Hamid Reza', 4],
    ['Sayyadzadeh, Golnaz & Esmaeili, Hamid Reza', 11],
    ['Çiçek, Erdogan & Sungur, Sevil & Fricke, Ronald', 1],
    ['Çiçek, Erdoğan & Fricke, Ronald & Sungur, Sevil', 2],
    ['Çiçek, Erdoğan & Jawad, Laith & Eagderi, Soheil', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    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);