function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Etzler, Frank E.', 1],
    ['Ghahari, Hassan & Packova, Gabriela & Platia, Giuseppe', 2],
    ['Kabalak, Mahmut & Platia, Giuseppe & Avci, Mustafa', 1],
    ['Kundrata, Robin & Németh, Tamás & Prosvirov, Alexander S.', 49],
    ['Nasserzadeh, Hiva & Platia, Giuseppe & Parsi, Farzaneh', 1],
    ['Németh, Tamás', 2],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 1],
    ['Zapata de la Vega, José Luis & Sánchez-Ruiz, Antonio', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    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);