function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Björnberg, Tagea K. S. & Radashevsk, Vasily I.', 2],
    ['Huys, Rony', 3],
    ['Kim, Il-Hoi', 5],
    ['Kim, Il-Hoi & Sikorski, Andrey & O’Reilly, Myles', 13],
    ['Lee, Jimin & Chang, Cheon Young & Kim, Il-Hoi', 2],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Uyeno, Daisuke & Kakui, Keiichi', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);