function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, Volker', 1],
    ['Bekchiev, Rostislav', 2],
    ['Besuchet, Claude & Cuccodoro, Giulio & Sabella, Giorgio', 3],
    ['Chandler, Donald S. & Lewis, Julian J.', 1],
    ['Fancello, Luca & Hernando, Carles & Leo, Piero', 1],
    ['Hernando, Carles & Pérez, Toni', 1],
    ['Hlaváč, Peter', 1],
    ['Poggi, Roberto', 1],
    ['Poggi, Roberto & Magrini, Paolo', 1],
    ['Poggi, Roberto & Sarbu, Serban M.', 1],
    ['Sabella, Giorgio & Amore, Elena & Nicolosi, Giuseppe', 1],
    ['Sabella, Giorgio & Costanzo, Salvatore & Nicolosi, Giuseppe', 1],
    ['Sabella, Giorgio & D’urso, Vera & Nouira, Said & Souissi, Rhida', 1],
    ['Sabella, Giorgio & Nouira, Vera D’Urso Said & Souissi, Rhida', 8],
    ['Sabella, Giorgio & Viglianisi, Fabio Massimo & D’Urso, Vera', 4],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    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);