function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 1],
    ['Golani, Daniel & Bogorodsky, Sergey V.', 1],
    ['Hasan, Mohammad Eusuf & Durand, Jean-Dominique & Iwatsuki, Yukio', 2],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 1],
    ['Iwatsuki, Yukio & Carpenter, Kent E.', 1],
    ['Iwatsuki, Yukio & Heemstra, Phillip C.', 2],
    ['Sayyadzadeh, Golnaz & Esmaeili, Hamid Reza', 1],
    ['Siddiqui, Pirzada Jamal & Amir, Shabir Ali & Masroor, Rafaqat', 5],
    ['Yukio Iwatsuki & Kent E. Carpenter', 13],
    ['Çiçek, Erdoğan & Jawad, Laith & Eagderi, Soheil', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    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);