function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 2],
    ['Barrientos, Jose A. & Prieto, Carlos E. & Pina, Silvia', 1],
    ['Biswas, B. & Majumder, S. C.', 2],
    ['Bosmans & Van Keer', 1],
    ['Candek, Klemen & Gregoric, Matjaz & Kostanjsek, Rok', 6],
    ['Dean, David Allen', 4],
    ['Della Rocca, Francesca & Stefanelli, Silvia & Cardarelli, Elisa', 2],
    ['Esyunin, S. L. & Kazantsev, D. K', 3],
    ['Isaia, Marco & Paschetta, Mauro & Chiarle, Alberto', 2],
    ['Levy, Gershom', 2],
    ['Marjan Komnenov & Eva Pitta & Konstantina Zografou', 2],
    ['Milano, Filippo & Mammola, Stefano & Rollard, Christine', 2],
    ['Paschetta, Mauro & Christille, Claretta & Marguerettaz, Fabio', 7],
    ['Ponomarev, A. V. & Bragina, T. M. & Shmatko, V. Yu.', 2],
    ['Tang, Guo & Li, Shuqiang', 2],
    ['Other (9)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    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);