function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 6],
    ['Dean, David Allen', 4],
    ['Durán-Barrón, CÉSAR G. & Rosas, MARÍA V.', 2],
    ['Kananbala, A. & Manoj, K. & Bhubaneshwari, M. & Binarani, A.', 1],
    ['Ponomarev, A. V. & Bragina, T. M. & Shmatko, V. Yu.', 1],
    ['Seropian, Armen & Bulbulashvili, Natalia & Krammer, Hans-Joachim', 1],
    ['Valdez-Mondragón, Alejandro & Cabrera-Espinosa, Luis A.', 2],
    ['Wright, B. M. O. G. & Wright, C. D. & Sole, C. L. & Lyle, R.', 2],
    ['ZONSTEIN, SERGEI & MARUSIK, YURI M.', 1],
    ['Zamani, A. & Marusik, Y. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);