function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bhattarai, Santosh & Pokheral, Chiranjibi Prasad', 1],
    ['Chandramouli, S. R.', 1],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 4],
    ['Hakim, Jonathan & Trageser, Scott J. & Ghose, Animesh', 2],
    ['Jablonski, Daniel & Regan, John M. & Holzheuser, Chace', 1],
    ['Meetei, Asem Bipin & Das, Sunandan & Campbell, Patrick D.', 1],
    ['Syafiq, Muhamad Fatihah & Badli-Sham, Baizul Hafsyam', 1],
    ['Teynié, Alexandre & David, Patrick & Ohler, Annemarie', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);