function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amarasinghe, A. A. Thasun & Karunarathna, D. M. S. Suranjan', 1],
    ['Das, Abhijit & Gower, David J. & Narayanan, Surya & Pal, Saunak', 1],
    ['David, P. & Vogel, G. & van Rooijen, J.', 7],
    ['David, Patrick & Das, Indraneil & Vogel, Gernot', 1],
    ['David, Patrick & Nguyen, Truong Quang & Nguyen, Tao Thien', 1],
    ['David, Patrick & Vogel, Gernot', 2],
    ['David, Patrick & Vogel, Gernot & Pauwels, Olivier S. G.', 3],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 4],
    ['Fukuyama, Ryobu & Fukuyama, Ibuki & Kurita, Takaki', 1],
    ['Grismer, L. Lee & Neang, Thy & Chav, Thou & Wood, Perry L. & Jr', 1],
    ['Hakim, Jonathan & Trageser, Scott J. & Ghose, Animesh', 3],
    ['Mirza, Zeeshan A. & Bhardwaj, Virender Kumar & Patel, Harshil', 1],
    ['Pauwels, Olivier S. G. & Larsen, Henning & Suthanthangjai, Winai', 2],
    ['Pauwels, Olivier S. G. & Thongyai, Kanokorn & Chantong, Pajapon', 3],
    ['Syafiq, Muhamad Fatihah & Badli-Sham, Baizul Hafsyam', 2],
    ['Other (11)', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=44)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);