function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arunkumar, L. & Thoibi, M. & Jajo, E.', 1],
    ['Banyal, Harinder Singh & Kumar, Sanjeev', 1],
    ['Chen, Y. - R.', 2],
    ['Dishma, M. & Vishwanath, W.', 1],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 1],
    ['Li, W. - X. & Mao, W. - N. & Lu, Z. - M.', 1],
    ['Marcus Knight, J. D. & Rai, Ashwin & D’Souza, Ld. K. P.', 3],
    ['Saad, Adib & Çiçek, Erdoğan & Esmaeili, Hamid Reza', 1],
    ['Sayyadzadeh, Golnaz & Esmaeili, Hamid Reza', 1],
    ['Tejavej, Anuratana', 2],
    ['Yue, P. - Q. & He, J. - C.', 1],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 2],
    ['Çiçek, Erdoğan & Jawad, Laith & Eagderi, Soheil', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);