function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 1],
    ['Azarkina, Galina N. & Foord, Stefan H.', 1],
    ['Haddad, Charles R. & WHVRáRZVND, Wdqgd', 2],
    ['Wesolowska, Wanda & Haddad, Charles R.', 2],
    ['Wesołowska, Wanda & Azarkina, Galina N. & Russell-Smith, Anthony', 14],
    ['Wesołowska, Wanda & Haddad, Charles R.', 5],
    ['Zhang, Jun-Xia & Maddison, Wayne P.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);