function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akhter, Muhammad Atique & Platia, Giuseppe & Rizvi, Syed Anser', 3],
    ['Ghahari, Hassan & Packova, Gabriela & Platia, Giuseppe', 8],
    ['Girard, Claude', 2],
    ['Gulpercin, N. & Tezcan, S.', 6],
    ['Johnson, Paul J. & Casari, Sônia A.', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Nasserzadeh, Hiva', 7],
    ['Nasserzadeh, Hiva & Platia, Giuseppe & Parsi, Farzaneh', 3],
    ['Nasserzadeh, Hiva & Platia, Giuseppe & Serri, Sayeh', 3],
    ['Németh, Tamás', 6],
    ['Platia, Giuseppe', 8],
    ['Platia, Giuseppe & Ghahari, Hassan', 22],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 2],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 2],
    ['Zapata, José Luis & Sánchez-Ruiz, Antonio', 3],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=80)',
    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);